DOCUMENT:Q96286 23-OCT-1999 [foxmisc] TITLE :ON ERROR Does Not Trap All Errors PRODUCT :Microsoft Fox Miscellaneous Products PROD/VER:MACINTOSH:2.01 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft FoxBASE+ for Macintosh, version 2.01 ------------------------------------------------------------------------------- SUMMARY ======= Using the ON ERROR command may not trap all error conditions. Specifically, if the ON ERROR command does not call a procedure, it will trap only the first occurrence of an error. All subsequent errors will be handled by FoxBASE+/Mac internally. MORE INFORMATION ================ The following code example demonstrates how the ON ERROR command is executed only on the first occurrence of an error. The second and third occurrences of the same error are not handled by the defined ON ERROR command, but rather by the internal FoxBASE+/Mac error handling routine. ON ERROR ALERT STOP 1 STR(ERROR()) 3=x * returns error number 12 3=x * returns message "Variable not found" 3=x * returns message "Variable not found" A workaround is to place the ON ERROR command in a procedure, as shown below: filename = SYS(16) SET PROCEDURE TO &filename ON ERROR DO ErrorProc 3=x * returns error number 12 3=x * returns error number 12 3=x * returns error number 12 PROCEDURE ErrorProc ALERT STOP 1 STR(ERROR()) RETURN Additional query words: 2.01 ====================================================================== Keywords : Technology : kbHWMAC kbOSMAC kbAudDeveloper kbFoxproSearch kbFoxBASE201Mac kbFoxBASESearch Version : MACINTOSH:2.01 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.