OMPython using getParameterValue with sendExpression in a python script #54

I tried every command listed in the scripting API, everyone works except for getParameterValue:

when I type omc.sendExpression("setParameterValue(MyModel, param1, 2)") it replies: OK
(I already loaded the MyModel model first using loadModel with sendExpression)

when I type omc.sendExpression("getParameterValue(MyModel, param1)") it should reply "2" but instead it gives me a huge error:

File "", line 1, in
File "/home/user/.local/lib/python2.7/site-packages/OMPython/init.py", line 484, in sendExpression
answer = OMTypedParser.parseString(result)
File "/home/user/.local/lib/python2.7/site-packages/OMPython/OMTypedParser.py", line 109, in parseString
return omcGrammar.parseString(string)[0]
File "/home/user/.local/lib/python2.7/site-packages/pyparsing.py", line 1632, in parseString
raise exc
pyparsing.ParseException: Expected {quoted string, starting with " ending with " | Combine:({["-"] {"0" | W:(1234...,0123...)} [{"." W:(0123...)}] [{W:(eE) W:(0123...,0123...)}]}) | Forward: ... | Group:({Suppress:("{") [Forward: ... [, Forward: ...]...] Suppress:("}")}) | Group:({Suppress:("(") [Forward: ... [, Forward: ...]...] Suppress:(")")}) | {Suppress:("SOME") Suppress:("(") Forward: ... Suppress:(")")} | "true" | "false" | {"NONE" Suppress:("(") Suppress:(")")} | Combine:(Forward: ...)} (at char 1), (line:2, col:1)

Am I doing something wrong or is my installation corrupted? Because any other command from the scripting API works just fine.

Thank you.