Modifying Multiple Drawings via VBA

[BML]

I'm trying to write some code that will make certain modifications to a set of drawings. One of the first tasks is to get the list of all layers on the active drawing, then cycle through each using a for-next loop to modify those layers (turn off, rename, etc.). This works okay for the first drawing I process. I then continue on with some other changes, save and close the active drawing. Then when I switch to the next drawing and make it active, I try to read in the new layer names and run the for-next loop again. On the second pass through I get a fatal error unhandled access violation exception. I thought it might have been caused by using the same variable to represent the current and set of all layers, but indexing the variables did not help. Any thoughts?

Thanks!

 

[borgunit]

Make sure your variables are not globals. Local variables will get set to nothing when the function or sub is done running. Like you said, you may have assigned a object to a variable that loses its reference when you close the file and start on the next one.

"Whether you think that you can, or that you can't, you are usually right "
.. Henry Ford

 

[BML]

I don't have any global declarations in this file. I know that I can read what the current document is, as I put in some message boxes and stepped through the code. I can cycle to the beginning of the 2nd For-Next loop, activate the next drawing, count the number of total drawings open, and display a message box that shows these values. But when I start the For-Next loop to go through the layers, it always hangs up.

Thanks!

 

[borgunit]

Not seeing the code, I will try a few tips:
-Purge the drawing before processing it.
-Make sure layers are not locked or frozen (something that might make it trip)
-Set the variable that seems to catch on to nothing before exiting the routine
-Make sure the layer is not an xref layer

A beginning place..

"Whether you think that you can, or that you can't, you are usually right "
.. Henry Ford