RFORCE in two subcases use a wrong axis origin

[victorkemp]

The origin grid point for the 2nd subcase is also used for the first subcase.

Example:

SOL 101
CEND
SPCFORCES = ALL
SUBCASE 3
 LOAD = 33
SUBCASE 4
 LOAD = 44
BEGIN BULK
GRID           1       0     1.0     0.0   0.0                 1
GRID           2       0     2.0     0.0   0.0
CELAS2         1   3.0+6       1       1       2       1
CONM2          2       2       0     7.0
RFORCE        33       0       0     1.5     0.0     1.0     0.0
RFORCE        44       1       0     1.5     0.0     1.0     0.0
ENDDATA 

Reaction force = -m * (2 * pi * V )**2 * r
m = 7
V = 1.5

Subcase 3:

r = 2 because GID=0 so the rotation axis is the basic system origin.
Reaction force = -1243.5701545372592

Subcase 4:

r = 1 because GID=1 so the rotation axis is the grid point at x=1.0
Reaction force = -621.7850772686296

Mystran subcase 3: -6.217851E+02 wrong
Comlab subcase 3: -1.243570E+03 correct

Mystran subcase 4: -6.217851E+02 correct
Comlab subcase 4: -6.217851E+02 correct