Activity Chart Checks : (C3119) Elements containing a truth table with illegal factorization structure

(C3119) Elements containing a truth table with illegal factorization structure

Error In:
Correctness
Description:
Either joined input cells are not nested in a previous join or there are two or more rows that share the same input section, but have different output sections.
Example:
The following figure show the truth table definition for activity ACT_1. An error is generated because the joined cells in column 2 are not a subset of any previous join. The tool will warn of this situation when you save the truth table.
Erroneous Elements:
Subroutines, actions, and activities