There were some problems running the test file?

[biaogxb]

when I running the Diffusion1DTest.py test file and KMC operation terminated suddenly

Then the error is reported as follows：
Diffusion1DTest.txt

ERROR: testRun (main.Diffusion1DTest)
Run the model and check the results.

Traceback (most recent call last):
File "Diffusion1DTest.py", line 119, in testRun
fit = numpy.linalg.lstsq(A, b, rcond=None)
File "/usr/lib64/python2.7/site-packages/numpy/linalg/linalg.py", line 1838, in lstsq
0, work, -1, iwork, 0)
TypeError: a float is required

---

Ran 1 test in 13.851s

FAILED (errors=1)

Does anyone know what the problem is？