Virusim,

Look for a SUBSTR() function call that has the length or start point defined outside the actual length of the string. The error message is affected by the Talk setting.

lcVar = "ABC"
SET TALK ON
? SUBSTR(lcVar,1,4) && No error
? SUBSTR(lcVar,4,1) && Error

SET TALK OFF
? SUBSTR(lcVar,1,4) && Error
? SUBSTR(lcVar,4,1) && Error