I receiving the attached error when running the Drainage Tabulation tool from the menu bar. I have a drainage project open and the GEOPAK gpk path as well as working directory path are pointed to the drainage folder. The GPK and GDF files are in the drainage folder. The GDF file opens fine and the network can be analyzed OK.
Using PowerGEOPAK 08.11.09.878 and FDOT SS4 MR9.