# LSErrorCode Enumeration¶

class localsolver.LSErrorCode

List of error codes used by py:class:LSError.

As other enumerations present in the localsolver module, LSErrorCode is enumerable and indexable:

print (LSErrorCode[0])          # Shows LSErrorCode.API
print (LSErrorCode.API.value)   # Shows 0

# Iterates over the members of LSErrorCode
for e in LSErrorCode:
print e

API

Code used for errors related to API functions. Used when you call a function in a wrong way or with inappropriate parameters.

Examples of error messages:

• Argument arg name cannot be null.
• Argument arg name does not belong to this instance of LocalSolver.
• Argument arg name must be positive.
• Argument arg name cannot be an empty string.
• This method is only allowed in state Modeling (the model must not be closed).
FILE

Code used when an error related to input/output operations occurs.

Examples of error messages:

• File doesn’t exist.
• File is corrupted.
• Cannot open file.
• File format is not recognized.
MODEL

Code used when a problem related to the structure of the model occurs.

Examples of error messages:

• At least one objective is required in the model.
• A cycle of length n was detected in the model.
• Number of operands (n) is too small: at least m operands are expected for operator.
• Operand n of operator must be type. Type provided: other type.
CALLBACK

Code used when an error is encountered in a user callback.

LICENSE

Code used when a problem related to licensing occurs. That could be a problem with the license itself (expiration, hardware signature, etc.), or a problem related to input/output or networking operations.

Examples of error messages:

• Property prop is missing in file [file].
• Fail to contact the token server. Check your connection.
• This license is not compatible with the current hardware.
• No token available. All tokens are currently in use.
SOLVER

Code used when a problem occurs during the resolution.

INTERNAL

Internal LocalSolver error.

MODELER

Code used when an error is encountered in the modeler.