Is there a possibility to get the library parameters before uninstalling the old library?
You can get the list of parameters for a library from the property "parameters" from a library reference which you get from the LibMan object.
This example code shows the list of existing parameters of the library reference from the LibMan object and also change some for my test library:
params = library_reference.parameters
for name in params:
print "param: %s => %s" % (name, params[name])
# set the parameter to new value
params[name] = "120"
print "new value of param: %s => %s" % (name, params[name])
Is there perhaps a new ScriptEngine 126.96.36.199 with this ILibManager.replace() or ILibManager.update()interface?
ILibMananager is not the LibMan object but the library repository manager of CODESYS. Get the LibMan object of your application or use the one of the Pool and remove the old library reference and add a new one with the required version.
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