KUKA Robot codes
KUKA RobotSystemBasic

KRC0399

KUKA Robot KRC0399 - <object> : <number of errors> COMPILATION ERROR

<object> : <number of errors> COMPILATION ERROR

The KRL compiler has detected one or more syntax or semantic errors in the specified program file during compilation. The alarm message indicates the exact count of compilation errors that must be resolved before the program can execute on the KRC4 controller.

Common Causes

  • Syntax errors in KRL source code such as missing semicolons, brackets, or incorrect statement structure
  • Undeclared or incorrectly declared variables, data types, or function parameters
  • Invalid function calls or references to undefined procedures or interrupt handlers
  • Type mismatch errors where incompatible data types are assigned or compared
  • Incorrect motion command syntax or invalid parameters in PTP or LIN movement instructions

Troubleshooting Steps

  1. 1Open the affected KRL file in WorkVisual and review the compiler error messages in the diagnostics panel
  2. 2Check each flagged line for syntax errors including missing delimiters, operators, or statement terminators
  3. 3Verify all variable declarations match their usage and confirm proper data type assignments throughout the program
  4. 4Review function signatures and ensure all called functions are properly defined and parameters are correctly specified
  5. 5Validate all motion commands contain required parameters such as velocity, acceleration, and tool frame definitions
  6. 6Recompile the program after corrections to ensure all errors are resolved and the project builds successfully

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