operation_err

Returns an error when an operation is not valid within the current context.

This function does not generate a change.

Function

operation_err([message])

Arguments

Argument Type Description
message str (optional) Alternative error message.

Return value

An error value (in a client response, an error value will be packed as a string value with the error message).

Example

This code shows operation_err():

operation_err();

Return value in JSON format

"operation is not valid in the current context"