What causes KUKA Robot alarm KRC0840?

Missing or misspelled type name in variable declaration (e.g., 'DECL var'). Invalid characters or special symbols in custom type name definition. Attempting to use a type name that has not been declared or imported. Incorrect syntax in STRUC, CLASS, or custom type definition statement. Type name reference without proper module/namespace prefix when required.

How do I fix KUKA Robot alarm KRC0840?

1. Review the line indicated in the compiler error message and verify the type name syntax is correct 2. Check that all custom type names (STRUC, CLASS, or TYPEDEF) are properly declared before use 3. Verify imported modules are available and type names are accessible with correct namespace prefixes 4. Ensure variable declarations follow proper KRL syntax: 'DECL ' 5. Check for typos, missing characters, or invalid symbols in the type name or declaration statement 6. Consult the KRL reference manual for correct syntax of type declarations and use a syntax checker or IDE for validation

KUKA Robot codes

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KUKA Robot Controller

System · Basic

Alarm KRC0840

KUKA Robot KRC0840 - USER, DEVICE OR NODE TYPE NAME EXPECTED 2176

This alarm indicates a syntax error in KRL code where the compiler expected a user-defined, device, or node type name but encountered invalid syntax. The error occurs during program compilation when a type declaration or reference is malformed or missing the required identifier.

KUKA RobotSystemBasic

KRC0840

KUKA Robot KRC0840 - USER, DEVICE OR NODE TYPE NAME EXPECTED 2176

USER, DEVICE OR NODE TYPE NAME EXPECTED 2176

Common Causes

Missing or misspelled type name in variable declaration (e.g., 'DECL <missing_type> var')
Invalid characters or special symbols in custom type name definition
Attempting to use a type name that has not been declared or imported
Incorrect syntax in STRUC, CLASS, or custom type definition statement
Type name reference without proper module/namespace prefix when required

Troubleshooting Steps

1Review the line indicated in the compiler error message and verify the type name syntax is correct
2Check that all custom type names (STRUC, CLASS, or TYPEDEF) are properly declared before use
3Verify imported modules are available and type names are accessible with correct namespace prefixes
4Ensure variable declarations follow proper KRL syntax: 'DECL <typename> <varname>'
5Check for typos, missing characters, or invalid symbols in the type name or declaration statement
6Consult the KRL reference manual for correct syntax of type declarations and use a syntax checker or IDE for validation

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