Add-in w/toolbar crashes on one of many company machines

[akh2103]

Hello--I have written a series of macros, attached them to a toolbar
and saved them as an add-in for my co-workers to use. The macros had
been working well on many machines for 4 months, but when a co-worker
successfully installed my add-in on his new laptop and tried to run one
of the macros, Excel crashes and gives the message:
"Microsoft Excel encountered a problem and needs to close. Information
may be lost."

I am somewhat of a VB newbie and have no idea where to begin without an
error message. Any suggestions of where to look and what might solve
the problem would be much appreciated.

Thanks.
-Abe

 

[akh2103]

So the most likely/plausible culprit is a specific line of code?

-Abe

 

[akh2103]

There are 12 programs and they all crash. This makes me think that one
single line of code is not likely the culprit. Is there any other
possible cause for this problem that I could look into before I talk my
co-worker thru the code, line-by-line over the phone (he is in a
different office)?

-Abe