Operator/Operand Mismatch ​
If you are placing two different types of fields/expressions in the same report expression AND combining them using the plus sign concantenator [+], you may receive the following Operator/Operand error:
To correct this error, you must use the appropriate function to turn the date or number type field into a character expression such as DTOC(), STR(), or TRANSFORM().
For example:
"Our records show you made a payment on"+dtoc(pydate)