Program is unreadable

Program interrupted

Machine storage exhausted

Unmatched "/*" or quote

WHEN or OTHERWISE expected

Unexpected THEN or ELSE

Unexpected WHEN or OTHERWISE

Unexpected or unmatched END

Control stack full

Clause too long

Invalid character in program

Incomplete DO/SELECT/IF

Invalid hexadecimal or binary string

Label not found

Unexpected PROCEDURE

THEN expected

String or symbol expected

Symbol expected

Invalid data on end of clause

Invalid character string

Invalid SBCS/DBCS mixed string

Invalid TRACE request

Invalid sub-keyword found

Invalid whole number

Invalid DO syntax

Invalid LEAVE or ITERATE

Environment name too long

Name or string > 250 characters

Name starts with number or “.”

Invalid use of stem

Invalid expression result

Logical value not 0 or 1

Invalid expression

Unmatched “(” in expression

Unexpected “,” or “)”

Invalid template or pattern

Evaluation stack overflow

Incorrect call to routine

Bad arithmetic conversion

Arithmetic overflow/underflow

Routine not found

Function did not return data

No data specified on function RETURN

Invalid variable reference

Unexpected label

Failure in system service

Interpreter failure