Ignore types variable and system in operational engine as these should be already processed and never hit the operation engine except in cases where variables/system calls have not yet been processed e.g. during apply of permutations
Ignore types variable and system in operational engine as these should be already processed and never hit the operation engine except in cases where variables/system calls have not yet been processed e.g. during apply of permutations

sebastian-software/jasy,sebastian-software/jasy