This message is generated when ContinuedFraction is unable to compute enough terms to start the algorithm, or when an error occurs while computing a numerical approximation for the first argument.
Off[message] switches off the message; On[message] switches it on. For example: Off[ContinuedFraction::start].
Examples
Basic Examples(1)
The expansion has only one term before the precision of the first argument is reached:
Numerical computation of the first argument generates an error: