This message is generated when the sixth argument in SeriesData is not a positive integer or is too large to be represented as a machine integer on your computer.
This message is normally seen only if a SeriesData expression is constructed directly, rather than constructed internally by Series.
Off[message] switches off the message; On[message] switches it on. For example: Off[SeriesData::sdatd].
Examples
Basic Examples(1)
An error occurs because a list is not a valid value for the sixth argument in SeriesData: