What causes KUKA Robot alarm KRC0730?

Passing a non-boolean value to a function or conditional statement that expects TRUE/FALSE. Incorrect variable type assignment where a numeric or string value is used instead of BOOL. Missing or malformed comparison operator in an IF/WHILE/UNTIL statement. Using an undefined variable in a boolean context. Incompatible data type conversion in logical operations (AND, OR, NOT).

How do I fix KUKA Robot alarm KRC0730?

1. Review the KRL source code around the line number indicated in the error message 2. Verify all conditional statements (IF, WHILE, UNTIL) contain proper boolean expressions with comparison operators 3. Check variable declarations and ensure boolean operations use BOOL type variables 4. Confirm function parameters match their expected data types in function definitions 5. Add explicit type casting or comparison operators if numeric values are being evaluated as booleans 6. Recompile the KRL program after corrections and verify syntax in the KRC editor

KUKA Robot codes

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KUKA Robot Controller

System · Basic

Alarm KRC0730

KUKA Robot KRC0730 - “TRUE” OR “FALSE” EXPECTED 2066

This alarm indicates a type mismatch in KRL program logic where a boolean value (TRUE or FALSE) was expected but not provided or a different data type was encountered. The error occurs during program compilation or interpretation when a conditional statement or boolean operation receives an incompatible argument or expression.

KUKA RobotSystemBasic

KRC0730

KUKA Robot KRC0730 - “TRUE” OR “FALSE” EXPECTED 2066

“TRUE” OR “FALSE” EXPECTED 2066

Common Causes

Passing a non-boolean value to a function or conditional statement that expects TRUE/FALSE
Incorrect variable type assignment where a numeric or string value is used instead of BOOL
Missing or malformed comparison operator in an IF/WHILE/UNTIL statement
Using an undefined variable in a boolean context
Incompatible data type conversion in logical operations (AND, OR, NOT)

Troubleshooting Steps

1Review the KRL source code around the line number indicated in the error message
2Verify all conditional statements (IF, WHILE, UNTIL) contain proper boolean expressions with comparison operators
3Check variable declarations and ensure boolean operations use BOOL type variables
4Confirm function parameters match their expected data types in function definitions
5Add explicit type casting or comparison operators if numeric values are being evaluated as booleans
6Recompile the KRL program after corrections and verify syntax in the KRC editor

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