Displaying multi valued number parameters on a report.

Question

I need to display the contents of some muti valued parameters on my report.  I have received two suggestions neither of which I can get to work. 
The first suggestion uses the Join function as follows:
WhilePrintingRecords;
Join({?Parameter}, Chr(10));
This only seems to work with string arrays.  I can't seem to get it to work with number arrays.
The second suggestion is as follows. 
WhilePrintingRecords;
Shared numberVar counter;
//increments the loop so that all parameter entries can be displayed
Shared stringVar display;
//creates a string "running total" so that all entries can be displayed
for counter := 1 to Count({?Parameter}) do
display := display + ToText({?Parameter}[counter],0,"") + Chr(10);
display;
Even though the Parameter is a multi valued number parameter it gives the following error when converting it to Text:
"A number, currency amount, boolean, date, time, date-time, or string is required here."

Answer 1

The formula for multi-value numeric parameter works just fine.
WhilePrintingRecords;
Shared numberVar counter;
//increments the loop so that all parameter entries can be displayed
Shared stringVar display;
//creates a string "running total" so that all entries can be displayed
for counter := 1 to Count({?Parameter}) do
display := display + ToText({?Parameter}[counter],0,"") + Chr(10);
display;
Please double check the "options" area of the multi-value numeric parameter.  The only way I can replicate the error you receive is if I choose both "Multiple Values = True" and "Range Values = True".  If this is the case then set Range values to false and see if it works while leaving Multiple Values = true.