Bug? all B4 progs show error on startup after Windows NET update


Licensed User
After the NET framework security and quality rollup KB 4055532 and malicious software tool KB 890830 updates installed today 10.1 on win 7 64bit machine all B4X programs open with errors, the problem seems to be that the saved paths for java etc were deleted and can no longer be saved. The Error Message at startup reads "Der Typeninitialisierer für "ct" hat eine Ausnahme verursacht."
Is this a known problem ?
Thank you,

p.s after going back to restore point from yesterday everything works fine again
Last edited:


Active Member
Licensed User
Just got the faulty update yesterday, no new updates available at this time.
I'll give it a few days to see if any update gets released.


Active Member
Licensed User
Thank you Erel,

Installation of following with windows update solve the problem for me, without uninstall any previous update.
Update for Microsoft .NET Framework 4.7.1 on Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB4074906)