dwgconvert caueses in some cases a process exit

[ds27680]

applies to dwgConvert 6.0 A.05

It would seem at some point under certain circumstances dwgconvert calls the CRT function _chdrive with 0 as parameter. _chdrive checks the parameter internally for validity extract from cRT sources:

if (drive < 1 || drive > 26) {
_doserrno = ERROR_INVALID_DRIVE;
_VALIDATE_RETURN(("Invalid Drive Index",0), EACCES, -1);
}

this calls out in the end the _invalid_parameter default handler which results in the process being terminated.

I was unable to find a reliable way to reproduce the issue, sometimes it occurs after a few conversions, sometimes I cannot reproduce it. it would seem not to be related to a certain file type /content since sometimes it works with the same file that caused problems before.

Unfortunately I did not save the stack when the issue occurred and for the time being I am unable to reproduce the issue.

[GuthCAD Software Support]

Hi,

I suspect that the problem you have experiened has been resolved in dwgConvert 6.0 A.10 or above. Specifically that version fixed a problem with translating files with UNC paths, and part of the resolution was to put in validation that the _chdrive parameter is > 0 (which is consistent with your detective work )

So please try the latest version to see if it resolves the issue.

http://www.guthcad.com/dwgdload.htm

best regards,
software support

[ds27680]

Hi,

Thanks for the reply. I will try to upgrade to the newer version as soon as possible.

Sherlock