This message is generated when a range specification in NIntegrate is not a list with three or more elements.
The range and the integration variable for a one-dimensional integral is specified in the second argument of NIntegrate. Range specifications for multidimensional integrals are specified using additional arguments.
Off[message] switches off the message; On[message] switches it on. For example: Off[NIntegrate::vars].
Examples
Basic Examples(1)
The range specification in NIntegrate must be a list with three or more elements: