I'm developing in VB.NET 2002 on Windows 2000 SP4.

When I'm running my application in the design environment, it generates an error at one point that says:  "There is no source code available for the current location."

If I click OK, it still runs the code, but it will not allow me to run it in break mode after that point, even if I put a Stop statement in the code.  It ignores the Stop statement.

It was originally running into this error at a line which executes a 3rd party COM method.  Mut the the problem migrated to an earlier line, where it's working only with intrinic VB.NET objects.

Could it be multi-threading perhaps, even though my program is not set up nor intended for multi-threading?  Is there a solution for this problem?  Thanks.