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Abaqus - Error message (Average Force NaN)

Abaqus - Error message (Average Force NaN)

Abaqus - Error message (Average Force NaN)

(OP)
Hi,

I'm using my own subroutine and input files. The job runs successfully, but when I try to see the results I have the following error message:

The selected Primary Variable is not available in the current frame for any elements in the current display group.

I've analysed the message file and I noticed the following after the first increment:

INCREMENT 2 STARTS. ATTEMPT NUMBER 1, TIME INCREMENT 1.00

NUMBER OF EQUATIONS = 24 NUMBER OF FLOATING PT. OPERATIONS = 4.90E+03

CHECK POINT START OF SOLVER

CHECK POINT END OF SOLVER

ELAPSED USER TIME (SEC) = 0.0000
ELAPSED SYSTEM TIME (SEC) = 0.0000
ELAPSED TOTAL CPU TIME (SEC) = 0.0000
ELAPSED WALLCLOCK TIME (SEC) = 0

CONVERGENCE CHECKS FOR EQUILIBRIUM ITERATION 1


AVERAGE FORCE NaN TIME AVG. FORCE 4.01
ALL FORCE RESIDUALS ARE ZERO
ALL DISP. INCREMENTS ARE ZERO
ALL CORRECTION TO DISP. ARE ZERO
THE FORCE EQUILIBRIUM RESPONSE WAS LINEAR IN THIS INCREMENT

ITERATION SUMMARY FOR THE INCREMENT: 1 TOTAL ITERATIONS, OF WHICH
0 ARE SEVERE DISCONTINUITY ITERATIONS AND 1 ARE EQUILIBRIUM ITERATIONS.

TIME INCREMENT COMPLETED 1.00 , FRACTION OF STEP COMPLETED 0.100
STEP TIME COMPLETED 2.00 , TOTAL TIME COMPLETED 2.00



Could this two information be related? Why is the average force NaN?

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