Crystal Reports Error: String can be at most 65534 characters

Message

     Hi,

Version: Crystal XI

I am using a string to gather log
ids. But when I run the report with wider search criteria I get an error
- Error: String can be at most 65534 characters.
How can I get rid of this error? Below is my formula. 

WhilePrintingRecords;
Global StringVar Array_Name;
numbervar slno;
Array_Name:= Array_Name & Cstr({PMP.LOG_ID}, 0) & ",";
if {@TimelyComplete}= 0 then
slno:= slno+ 1;

Thanks in advance!

-ES