Dear community,
I try to figure out which maximum time step + fix bonds setup I can apply to my polymer molecular dynamics in Forcite. At some point (time step = 4 fs + fix bonds) the calculation set up dies with following error output, std.err: "dynamics calculation - Constraint solver failed to converge (function/property "Compute") at -e line 25.", resp. .txt: "Dynamics calculation - Constraint solver failed to converge". Do you know how to solve this problem? FYI: The xsd-document contains round about 20 000 atoms (a few MMA chains). Is it a too big model for the Constraint solver? Is there any chance for an efficient workaround?

Thanks in advance!

Best regards

Attached you will find:
the set-up of the calculation: .txt
And a picture of the MatStudio log