Sapfewdbg Exception ?

While executing a ALV (object oriented) i got this error and program terminated.

<b>

Sapfewdbg Exception

Exception #1 has occurs and dumpted to this file:

c:\documents and settings\z999876\sapworkdir\FrontExceptions_4092_296.trc

Press OK to prepare an email with important information.

</b>

My SAPGui patch level is 44.

Any info on this..

aRs