尝试采用以下几种方法进行解决。

1 - Running double precision

2 - If already running double precision, try increasing the solver memory allocation factor from 1 to 1.2

3 - If the above suggestions don't work, try using the "Essential" option on the backups

4 - If the above doesn't work, try not writing backups, but instead just use the temporary res file that's written as the final res file.