FANN Error Handling

Errors from the fann library are usually reported on stderr.  It is however possible to redirect these error messages to a file, or completely ignore them by the fann_set_error_log function.

It is also possible to inspect the last error message by using the fann_get_errno and fann_get_errstr functions.

Summary
Errors from the fann library are usually reported on stderr.
Used to define error events on struct fann and struct fann_train_data.
Change where errors are logged to.
Returns the last error number.
Resets the last error number.
Resets the last error string.
Returns the last errstr.
Prints the last error to stderr.

fann_errno_enum

Used to define error events on struct fann and struct fann_train_data.

See also

fann_get_errno, fann_reset_errno, fann_get_errstr

FANN_E_NO_ERRORNo error
FANN_E_CANT_OPEN_CONFIG_RUnable to open configuration file for reading
FANN_E_CANT_OPEN_CONFIG_WUnable to open configuration file for writing
FANN_E_WRONG_CONFIG_VERSIONWrong version of configuration file
FANN_E_CANT_READ_CONFIGError reading info from configuration file
FANN_E_CANT_READ_NEURONError reading neuron info from configuration file
FANN_E_CANT_READ_CONNECTIONSError reading connections from configuration file
FANN_E_WRONG_NUM_CONNECTIONSNumber of connections not equal to the number expected
FANN_E_CANT_OPEN_TD_WUnable to open train data file for writing
FANN_E_CANT_OPEN_TD_RUnable to open train data file for reading
FANN_E_CANT_READ_TDError reading training data from file
FANN_E_CANT_ALLOCATE_MEMUnable to allocate memory
FANN_E_CANT_TRAIN_ACTIVATIONUnable to train with the selected activation function
FANN_E_CANT_USE_ACTIVATIONUnable to use the selected activation function
FANN_E_TRAIN_DATA_MISMATCHIrreconcilable differences between two struct fann_train_data structures
FANN_E_CANT_USE_TRAIN_ALGUnable to use the selected training algorithm
FANN_E_TRAIN_DATA_SUBSETTrying to take subset which is not within the training set
FANN_E_INDEX_OUT_OF_BOUNDIndex is out of bound
FANN_E_SCALE_NOT_PRESENTScaling parameters not present

Error Handling

fann_set_error_log

FANN_EXTERNAL void FANN_API fann_set_error_log(struct fann_error *errdat,
FILE *log_file)

Change where errors are logged to.  Both struct fann and <struct fann_data> can be casted to struct fann_error, so this function can be used to set either of these.

If log_file is NULL, no errors will be printed.

If errdata is NULL, the default log will be set.  The default log is the log used when creating struct fann and <struct fann_data>.  This default log will also be the default for all new structs that are created.

The default behavior is to log them to stderr.

See also

struct fann_error

This function appears in FANN >= 1.1.0.

fann_get_errno

FANN_EXTERNAL enum fann_errno_enum FANN_API fann_get_errno(
   struct fann_error *errdat
)

Returns the last error number.

See also

fann_errno_enum, fann_reset_errno

This function appears in FANN >= 1.1.0.

fann_reset_errno

FANN_EXTERNAL void FANN_API fann_reset_errno(struct fann_error *errdat)

Resets the last error number.

This function appears in FANN >= 1.1.0.

fann_reset_errstr

FANN_EXTERNAL void FANN_API fann_reset_errstr(struct fann_error *errdat)

Resets the last error string.

This function appears in FANN >= 1.1.0.

fann_get_errstr

FANN_EXTERNAL char *FANN_API fann_get_errstr(struct fann_error *errdat)

Returns the last errstr.

This function calls fann_reset_errno and fann_reset_errstr

This function appears in FANN >= 1.1.0.

fann_print_error

FANN_EXTERNAL void FANN_API fann_print_error(struct fann_error *errdat)

Prints the last error to stderr.

This function appears in FANN >= 1.1.0.

The fast artificial neural network(fann) structure.
Structure used to store data, for use with training.
FANN_EXTERNAL void FANN_API fann_set_error_log(struct fann_error *errdat,
FILE *log_file)
Change where errors are logged to.
FANN_EXTERNAL enum fann_errno_enum FANN_API fann_get_errno(
   struct fann_error *errdat
)
Returns the last error number.
FANN_EXTERNAL void FANN_API fann_reset_errno(struct fann_error *errdat)
Resets the last error number.
FANN_EXTERNAL void FANN_API fann_reset_errstr(struct fann_error *errdat)
Resets the last error string.
FANN_EXTERNAL char *FANN_API fann_get_errstr(struct fann_error *errdat)
Returns the last errstr.
FANN_EXTERNAL void FANN_API fann_print_error(struct fann_error *errdat)
Prints the last error to stderr.
Structure used to store error-related information, both struct fann and struct fann_train_data can be casted to this type.
Used to define error events on struct fann and struct fann_train_data.