This Array must be subscipted Error

[lthomas6]

I receive this error after I have modified a parameter in my report to allow for multiple values.

This error occurs in the formula field in my report which does the below:
If {?$LOOKUP$10004} = "ALL" Then
"All Companies"
Else
{?$LOOKUP$10004}

This formula is pulled into the Report Header of the report.

 

[lbass]

Change the formula to:

If {?$LOOKUP$10004} = "ALL" Then
"All Companies"
Else
join({?$LOOKUP$10004},", ")

...assuming this is intended to display the parameter selections.

-LB