Referencing a macro containing newlines and quote characters (i.e., "%LASTSTEP_OUTPUT%") from script code can result in errors. This happens because the macros are expanded before the script is evaluated, and most script languages don't allow newlines within string expressions (and quote characters denote the end of a string).
Instead, use the macro values in code without expanding to string literals:
Code:
vbld_AllMacros()("LASTSTEP_OUTPUT")
If the macro value could reference other macros and/or script expressions, use
Code:
Application.ExpandMacrosAndScript("%%LASTSTEP_OUTPUT%%")