SACS Motion Analysis for Tow

Hello! I am analyzing a Jack Up Rig with a single column for wet tow. During wet tow, the jack-up will be floating on its hull and the column will be above water.

The procedure I have adopted is as follows:

1. Perform a wave dynamic analysis in SACS Motions module to calculate the response of the structure. The cargo for the analysis is the column and the vessel is the hull of my jack-up. I have already designed the hull in maxsurf and placed the file in (both .msd and .hmd) inside the SACS vessel library.

2. Use the response file as an input to SACS Tow module to run tow analysis in order to check the strength of the column.

3. Perform linear static analysis with the generated static loads in tow analysis with other loads. 

Problem:

Every time I run the motion analysis, it gives an error stating "VESSEL ID NOT FOUND IN THE LIBRARY".

Please let me know if my procedure is correct and also how do I resolve the above issue.

Thanks in advance.