Error message when assigning h3dres for random response analysis

Hello all,

When trying to assign the results from a previously run frequency response to dummy subcases in a random analysis I receive for each of the 3 subcases an error like:

ERROR # 5747

Subcase ID = 502 does not exist in ASSIGN,H3DRES, 10

defined by IMPORT card in SUBCASE ID = 502. 

The relevant sections of the .fem and .out files are attached. 

When importing any of the three .h3d files into Hyperview, the results (displacements+ rotations) are there and with the right subcase id. 

Adding the (sub=502) to the Import does not make any difference. 

Thank you