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