Unre5559
2nd July 2005 19:48 UTC

FileOpen error: how to get descriptive text?
I use the following code to trap any errors when I am writing to a file:


FileOpen $0 $INSTDIR\new_file_name w
StrCpy $R1 "creation error"
ifErrors errors

FileWrite $0 $R1
StrCpy $R1 "write error"
ifErrors errors

FileClose $0
StrCpy $R1 "close error"
ifErrors errors
Goto end
errors:
MessageBox MB_OK "Error with file: $R1"
end:

This certainly works and traps the errors. However, all I know when I run this is that I have a creation error, or a write error, etc. How can I get the cause of the error (disk full, no permission, file exists, etc)?

I can't see anything in the manual that helps, and there is no code online that has given me any clues.

Any thoughts are welcome.

Thanks.

kichik
2nd July 2005 20:08 UTC

Best you can do, without changing the source, is use Windows API directly with the System plug-in. The System plug-in has an option to return the last error code - ?e. You can pass this error code to the FormatMessage API to get a textual message.

Unregis665454
2nd July 2005 20:20 UTC

OK, thanks. I'll do a bit of digging into the plugins.