SaveMat = True. TypeError: 'Dict' object is not callable

[SteMasoli]

Describe the bug
Hi.

I was checking a fairly old network script and everything still works fine except saveMat.

    sim.createSimulateAnalyze(netParams = netParams, simConfig = cfg)    
  File "/home/test/.local/lib/python3.10/site-packages/netpyne/sim/wrappers.py", line 207, in createSimulateAnalyze
    sim.analyze()
  File "/home/test/.local/lib/python3.10/site-packages/netpyne/sim/wrappers.py", line 132, in analyze
    sim.saveData()
  File "/home/test/.local/lib/python3.10/site-packages/netpyne/sim/save.py", line 231, in saveData
    toSave = deepcopy(toSave)
  File "/usr/lib/python3.10/copy.py", line 146, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python3.10/copy.py", line 231, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python3.10/copy.py", line 146, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python3.10/copy.py", line 231, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python3.10/copy.py", line 146, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python3.10/copy.py", line 231, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python3.10/copy.py", line 172, in deepcopy
    y = _reconstruct(x, memo, *rv)
  File "/usr/lib/python3.10/copy.py", line 297, in _reconstruct
    value = deepcopy(value, memo)
  File "/usr/lib/python3.10/copy.py", line 172, in deepcopy
    y = _reconstruct(x, memo, *rv)
  File "/usr/lib/python3.10/copy.py", line 297, in _reconstruct
    value = deepcopy(value, memo)
  File "/usr/lib/python3.10/copy.py", line 153, in deepcopy
    y = copier(memo)
TypeError: 'Dict' object is not callable

Reproducing the bug
For the moment I do not have another way to reproduce it.
I have tested SaveMat with the HHTut network but it produces a completely different error.

Expected behavior

SaveMat should save a Matlab file like it was able many years ago.

System information

• OS and version: Mint 21.3
• NetPyNE version: 1.0.7
• NEURON version: 8.2.4
• Python version: 3.10.12