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<span style="font-family:Helvetica,Arial; font-size:12pt; color:#000000"><b>Error Codes
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Here is the list of error codes which could be useful to handle errors and to provide user with the proper error message.
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You can see a practical example of errors handling in the MultiUser demo supplied with the Absolute DB.
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<span style="font-family:Courier New; font-size:8pt; color:#000000">&nbsp;<span style="font-family:Courier New; font-size:8pt; color:#000080"><i>//&nbsp;error&nbsp;codes</i></span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">
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&nbsp;<b>const</b>&nbsp;ABS_ERR_OK&nbsp;=&nbsp;<span style="font-family:Courier New; font-size:8pt; color:#000080">0</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_INSERT_RECORD&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">1</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_UPDATE_RECORD&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">2</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_DELETE_RECORD&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">3</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_UPDATE_RECORD_MODIFIED&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">4</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_DELETE_RECORD_MODIFIED&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">5</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_UPDATE_RECORD_DELETED&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">6</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_DELETE_RECORD_DELETED&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">7</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_CONSTRAINT_VIOLATED&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">8</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_UPDATE_RECORD_PROHIBITED&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">9</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_DELETE_RECORD_PROHIBITED&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">10</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_CANCEL_PROHIBITED&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">11</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_RECORD_LOCKED&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">12</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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&nbsp;<b>const</b>&nbsp;ABS_ERR_TABLE_LOCKED&nbsp;=&nbsp;-<span style="font-family:Courier New; font-size:8pt; color:#000080">13</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">;
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</span><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000"><b>Example:</b>
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</span><span style="font-family:Courier New; font-size:8pt; color:#000000"><b>procedure</b>&nbsp;TMainForm.ABSTable1DeleteError(DataSet:&nbsp;TDataSet;
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&nbsp;&nbsp;E:&nbsp;EDatabaseError;&nbsp;<b>var</b>&nbsp;Action:&nbsp;TDataAction);
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<b>begin</b>
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&nbsp;&nbsp;&nbsp;Action:=daAbort;
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&nbsp;&nbsp;&nbsp;<b>if</b>&nbsp;(E&nbsp;<b>is</b>&nbsp;EABSEngineError)&nbsp;<b>then</b>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>case</b>&nbsp;(EABSEngineError(E).ErrorCode)&nbsp;<b>of</b>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ABS_ERR_RECORD_LOCKED:
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>begin</b>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>if</b>&nbsp;MessageDlg(<span style="font-family:Courier New; font-size:8pt; color:#000080">'The&nbsp;record&nbsp;is&nbsp;locked.&nbsp;'</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">+
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="font-family:Courier New; font-size:8pt; color:#000080">'Do&nbsp;you&nbsp;want&nbsp;to&nbsp;try&nbsp;to&nbsp;delete&nbsp;this&nbsp;record&nbsp;again?'</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">,
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mtWarning,[mbYes,mbNo],<span style="font-family:Courier New; font-size:8pt; color:#000080">0</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">)=mrYes&nbsp;<b>then</b>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Action:=daRetry;
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>end</b>;
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ABS_ERR_TABLE_LOCKED:
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>begin</b>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>if</b>&nbsp;MessageDlg(<span style="font-family:Courier New; font-size:8pt; color:#000080">'The&nbsp;table&nbsp;is&nbsp;locked.&nbsp;'</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">+
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="font-family:Courier New; font-size:8pt; color:#000080">'Do&nbsp;you&nbsp;want&nbsp;to&nbsp;try&nbsp;to&nbsp;delete&nbsp;this&nbsp;record&nbsp;again?'</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">,
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mtWarning,[mbYes,mbNo],<span style="font-family:Courier New; font-size:8pt; color:#000080">0</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">)=mrYes&nbsp;<b>then</b>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Action:=daRetry;
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>end</b>;
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ABS_ERR_DELETE_RECORD_MODIFIED:
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>begin</b>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;MessageDlg(<span style="font-family:Courier New; font-size:8pt; color:#000080">'The&nbsp;record&nbsp;you&nbsp;are&nbsp;trying&nbsp;to&nbsp;delete&nbsp;has&nbsp;been&nbsp;modified&nbsp;by&nbsp;another&nbsp;user.&nbsp;'</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">+
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="font-family:Courier New; font-size:8pt; color:#000080">'The&nbsp;table&nbsp;will&nbsp;now&nbsp;be&nbsp;refreshed.&nbsp;If&nbsp;you&nbsp;want&nbsp;to&nbsp;delete&nbsp;this&nbsp;record,&nbsp;try&nbsp;again.'</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">,
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mtWarning,[mbOk],<span style="font-family:Courier New; font-size:8pt; color:#000080">0</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">);
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DataSet.Refresh;
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>end</b>;
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ABS_ERR_DELETE_RECORD_DELETED:
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>begin</b>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;MessageDlg(<span style="font-family:Courier New; font-size:8pt; color:#000080">'The&nbsp;record&nbsp;you&nbsp;are&nbsp;trying&nbsp;to&nbsp;delete&nbsp;has&nbsp;been&nbsp;deleted&nbsp;by&nbsp;another&nbsp;user&nbsp;'</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">+
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="font-family:Courier New; font-size:8pt; color:#000080">'The&nbsp;table&nbsp;will&nbsp;now&nbsp;be&nbsp;refreshed'</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">,
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mtWarning,[mbOk],<span style="font-family:Courier New; font-size:8pt; color:#000080">0</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">);
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DataSet.Refresh;
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>end</b>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>else</b>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;MessageDlg(E.<b>Message</b>,mtError,[mbOK],<span style="font-family:Courier New; font-size:8pt; color:#000080">0</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">);
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>end</b>
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&nbsp;&nbsp;&nbsp;<b>else</b>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;MessageDlg(E.<b>Message</b>,mtError,[mbOK],<span style="font-family:Courier New; font-size:8pt; color:#000080">0</span></span><span style="font-family:Courier New; font-size:8pt; color:#000000">);
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<b>end</b>;</span><span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">
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