IndexError: index 15 is out of bounds for axis 5 with size 15

[lacklusterNo]

Hello sir, this is an error in my program when identifying a concrete beam. The grid size of 15x15 or 30x30 has stopped at frame 15.
I only modified the upscale to be equal to 1, and all other setting parameters are default values.
I hope to receive your answer.Thanks.

root:INFO:Found 99 images in folder
muDIC.mesh.meshUtilities:INFO:Using Q4 elements
muDIC.mesh.meshUtilities:INFO:Element contains 30.0 X 30.0 pixels and is divided in 140 X 34
muDIC.solver.correlate:INFO:Processing frame nr: 1
root:INFO:Converged in 8 iterations
muDIC.solver.correlate:INFO:Processing frame nr: 2
root:INFO:Did not converged in 19 iterations last increment was 4.8524
muDIC.solver.correlate:INFO:Processing frame nr: 3
root:INFO:Did not converged in 19 iterations last increment was 4.4508
muDIC.solver.correlate:INFO:Processing frame nr: 4
root:INFO:Did not converged in 19 iterations last increment was 2.1891
muDIC.solver.correlate:INFO:Processing frame nr: 5
root:INFO:Did not converged in 19 iterations last increment was 3.6475
muDIC.solver.correlate:INFO:Processing frame nr: 6
root:INFO:Did not converged in 19 iterations last increment was 3.8177
muDIC.solver.correlate:INFO:Processing frame nr: 7
root:INFO:Did not converged in 19 iterations last increment was 2.9512
muDIC.solver.correlate:INFO:Processing frame nr: 8
root:INFO:Did not converged in 19 iterations last increment was 2.7295
muDIC.solver.correlate:INFO:Processing frame nr: 9
root:INFO:Did not converged in 19 iterations last increment was 2.9675
muDIC.solver.correlate:INFO:Processing frame nr: 10
root:INFO:Did not converged in 19 iterations last increment was 2.9839
muDIC.solver.correlate:INFO:Processing frame nr: 11
root:INFO:Did not converged in 19 iterations last increment was 2.3890
muDIC.solver.correlate:INFO:Processing frame nr: 12
root:INFO:Did not converged in 19 iterations last increment was 4.0410
muDIC.solver.correlate:INFO:Processing frame nr: 13
root:INFO:Did not converged in 19 iterations last increment was 3.4677
muDIC.solver.correlate:INFO:Processing frame nr: 14
root:INFO:Did not converged in 19 iterations last increment was 3.5449
muDIC.solver.correlate:INFO:Processing frame nr: 15
muDIC.solver.correlate:INFO:Updating reference at 15
root:INFO:Post processing results from Q4 elements. The seed variable is ignored and the values are extracted at the element centers. Use the upscale value to get interpolated fields.
Traceback (most recent call last):
File "C:\Users\Jdsoa\Desktop\muDIC-master\muDIC-master\Examples\quick_start.py", line 59, in
viz.show(field="engstrain", component=(0, 0), frame=i)
File "C:\Users\Jdsoa\Desktop\muDIC-master\muDIC-master\muDIC\post\viz.py", line 398, in show
fvar = self.fields.eng_strain()[0, component[0], component[1], :, :, frame]
IndexError: index 15 is out of bounds for axis 5 with size 15