Applies To
	Product(s):	Bentley SewerCAD, Bentley SewerGEMS, Bentley CivilStorm, Bentley StormCAD
	Version(s):	08.11.03.77
	Environment:	N/A
	Area:	Calculations
	Subarea:
	Original Author:	Scott Kampa, Bentley Technical Support Group

Error or Warning Message

In the AutoCAD-integrated version of the storm and sewer product, the following error message is generated:

"FATAL ERROR: Cannot write to undo file (probably disk full)"

Explanation

This is likely a model specific issue related to the model files and how they are opened in the AutoCAD-integrated version of the product. There are several things that you can try.

How to Avoid

First, try moving the .stsw, .stsw.mdb and .dwg files to a new folder location. Then open the model files from the new location.

Second, you can try compacting the database. To do this, open the standalone version of the product. Go to Tools > Database Utilities > Compact Database. Select the database and choose the option to purge the database to save space. Once this is completed, open the model files and see if the error message still occurs.

Third, reintegrate the OpenFlows product with AutoCAD. The ideal way of doing this is to go to the Control Panel, choose "Programs and Features" (for Windows 7) or "Add/Remove Programs" (for Windows XP). Select the OpenFlows product and choose Repair. This will reintegrate the product with AutoCAD.

Last, you can try upgrading to the latest version of the product.