Overview and Problem Report (PR) fixes The NX Nastran 10.1 maintenance release includes the following fixes. PR# Problem Reported Problem Description 1128190 V10.0 SOL 401 Creep - The stress oscillates with a constant load unless KUPDATE=1 (Full Newton-Raphson) is defined on the NLCNTL bulk entry. 1128682 V10.0 SOL 401 Creep+Plasticity - A model failed to solve with SMP=4, but solved fine for serial. 8252363 V10.0 SOL 401 - A model had difficulties solving a creep analysis. 8257119 V10.0 SOL 401 – Receiving the error message MOMENT IS NOT SUPPORTED as a result of applying a load with the MOMENT bulk entry. 7200246 V10.0 SOL 401 in the context of a NX 10 coupled multiphysics solution - output occurred for time steps in which output was not requested. In addition to the fixes listed above, there are SOL 401 improvements in NX Nastran 10.1 that improve the general solution performance, and specifically improve the performance of creep, nonlinear iteration schemes, contact, and bolt preload. Many of these improvements were made while tuning specific models. As a result, you may not necessarily see a performance improvement with your models. 2247218 V9.0 SOL 106 – Membrane Force was output as zero in a nonlinear analysis. A workaround is to set sys(500)=1 to output mechanical strain instead of the total strain. 7208138 V9.0 SOL 112 – Error in displacement output with MODACC and WMODAL. A workaround is to eliminate the parameters MODACC, DDRMM and WMODAL from the