PWL-Files Combination problem

Hi@all,

I want to use different PWL_File Voltage Sources at the same time. But some combinations of textfiles make problems.

file A.txt --> no problem

file B.txt --> no problem 

file C.txt --> no problem 

file A.txt & C.txt --> no problem 

file A.txt & B.txt --> I get the following error message:

ERROR(ORPSIM-15138): Convergence problem in Transient Analysis at Time =  99.90E-06.
         Time step =  147.7E-21, minimum allowable step size =  1.000E-18

The time steps inside the files are 5E-9 seconds.

Has somebody an idea, how to solve this problem?

Many thanks!

Andreas