# kernelv_ch_get_blocknumber()

## Prototype

KERNELV_RETURN | kernelv_ch_get_blocknumber (unsigned long int chanIndex, signed long int *blocknumber);

## Description

Reads the currently executed block number of an NC program.

## Parameter

Name | Type | Meaning
chanIndex | unsigned long | Channel index of the channel whose block number is to be read.
blocknumber | signed long* | Pointer to the value to which the block number is to be written.

## Return values

Symbol | Value | Meaning
RET_FINISHED | 0 | The function was executed without error.
ERR_INVALID_CHAN | -1 | The transferred channel index is higher than the number of configured channels -1.
ERR_CNC_NOT_INIT | -3 | The simulation CNC kernel was not yet initialised.