I found ASSERT .F. in the code, probably for debugging purposes. I will fix in the next release, but you can safely ignore it. Thanks for the report.

>Hi Joel,
>
>I got messagebox 'Assertion failed on line 0 of procedure foxtabsapplication.foxtabsmanager.refreshwindows.' when I selected 'Refresh' from the FoxTabs menu.
>
>
>
>>I just posted the first VFPX release of FoxTabs. I consider it a Beta release, and I would appreciate it if anyone/everyone would try it and report any problems. I did fix a couple of problems in this release, so if you've tried & dismissed it before, please give it another look. Craig & Scott created a really nice utility for us, and before long you'll wonder how you lived without it. It's rock solid in my IDE, but your mileage may vary.
>>
>>http://www.codeplex.com/VFPX/Wiki/View.aspx?title=FoxTabs