I am trying to compute the difference between two variables that are stored in two different solution files. The mesh and geometry are identical between the two files. After reading the documentation, I tried to use the AppendAttribute filter but see weird behavior. Before merging the two solution, I renamed the density variable to be densityNew and densityGold using a calculator filter.
I attached a screen shot showing the profiles of the two variables. The densityNew variable is not properly appended. I am not sure what is happening here. It looks like the ordering of the coordinates does not properly propagate when the AppenAttributes filter is used in this case.
I cannot reproduce this observed behavior in ParaView version 5.11.1 or 5.11.0-RC2. So if upgrading is an option, I recommend that. There may have been a bug fixed since 5.9.1.
I am still experiencing this problem in v6.1.0, but not for all files. When the problem does occur, however, it unfortunately makes the filter essentially useless
