In the "Group of Imperfection Cases" imperfection case, you can enter several geometric imperfection cases. This allows you to carry out GMNIA analyses where several geometric imperfections have to be superimposed. ☝️
More About RFEM 6:
http://www.dlubal.com/rfem
More Features of RFEM 6:
https://www.dlubal.com/en-US/support-and-learning/support/product-features?family=rfem-6
More About RSTAB 9:
http://www.dlubal.com/rstab
More Features of RSTAB 9:
https://www.dlubal.com/en-US/support-and-learning/support/product-features?family=rstab-9
Do you want to try it out? Download the free trial versions to get to know RFEM 6 and RSTAB 9: