Fatal menu shut down?

[CADMama]

Using ADT 2004
Menus have been created to insert blocks that are in the current drawing
When there is a problem and AutoCAD wants to shut down there is an error message presented that I do not understand. I am attaching a bmp file to show it.

I am also attaching the MNU file that has the LISP code in it.

HELP!!! :?

[RobertB]

You are trying to use an arx-defined command in a loop, as part of the command-pipeline. See the Visual LISP docs on externally defined commands for more information.

(BTW, Hi!)

[rkmcswain]

Usually, this is caused by a misbehaving ARX file...

Take a look at...
http://www.cadforum.cz/cadforum_en/qaID.asp?tip=5151
http://tinyurl.com/33m34e

Does every one of those menu entries invoke this error?
Just a particular one?
Or sort of random?