The Titan compiler cannot convert universal charstring literals to charstring, if it's inside an unfoldable (i.e. not known at compile-time) concatenation expression. Example: ``` var charstring vl_removables := " " & char(0,0,0,27) & "\[[DAK]"; // ok vl_removables := vl_removables & "|" & "\[[DAK] "; // ok vl_removables := vl_removables & "|" & "\[[DAK] " & char(0,0,0,27); // not ok vl_removables := char(0,0,0,27); // ok vl_removables := char(0,0,0,27) & vl_removables; // not ok ``` /cc @aknappqwt @mmagyari