There are various places in NetSTORM where the program crashes with or without ceremony. The programming is a lot simpler when one doesn't have to 'trap' lots of errors. If you encounter a persistent problem, please report it to me, and I'll see about fixing it.

Recently, a user found that the program crashed whenever he opened the STORM dialog, giving a 'type mismatch' error before crashing. In a case like this, the only recourse is to wipe out the program's settings and start fresh. In most cases, you should be able to go to Edit | Options from the main menu, and click the Clear Settings button. If this fails to work, it may then be necessary to manually clear the Windows registry. Invoke REGEDIT.EXE from the Windows folder or from a Run prompt. Navigate to HKEY_CURRENT_USERSoftwareVB and VBA Program SettingsNetSTORM. Press the Delete key to remove all NetSTORM references. You'll need to re-register the program to use the IDF analysis again.