john-hen
commented
2 years ago Hi. So, another license issue…
Let me address the easy part first: You get the LookupError because you passed version=5.6. That's a floating-point number, but needs to be a string: version='5.6'. Remember that there are Comsol versions which contain letters too, like 5.3a. Having multiple Comsol installations to choose from is not a problem at all, this was a design goal for MPh from the start. So that we can run benchmarks with the same model across different Comsol versions.
As for the license, that's something MPh tries to stay away from as much as possible. All it does is, essentially, start Comsol and then tell it what to do. But when Comsol loads a model, it (Comsol) checks the license and makes sure that you have the one for the core platform as well as for any add-on module ("product") that the model might require.
I've only ever had (and therefore tested with) the regular commercial "CPU-Locked License". But Comsol has a number of license options. I have no experience with any of the others, and also no idea how commonly there are used. "Research Kit" isn't even on that list and this is the first time I'm hearing that term.
For the "Class Kit" license we added support in #40. You need to set the corresponding config option with mph.option('classkit', True) before calling mph.start().
If that doesn't do it, then the question becomes: How do you start the Comsol server executable (comsolmphserver on Windows, comsol mphserver on Linux/macOS) from the command line? The Class Kit license, for example, requires a special argument to be passed: -ckl. I don't know why that's necessary, why Comsol's license manager can't figure this out by itself. But if you have to, for example, use that Research Kit license, or if the classkit option doesn't work, then seeing what it takes to start a server session in the console would be the first step to solving this issue.
cescoo1
shehan807
Hi,
first of all thanks for MPh package! I tried to follow the documentation but I get this error message. I may add, that I have a 'Classkit' Comsol License and a 'Reasearchkit' License on the machine. To make it more complicated, there are two versions of Comsol installed 5.5 and 5.6., of each license. But I only have access to the 'Classkit' version. I don't know if the problem lays in the 'Research-kit' license or if the issue is of a different nature.
Lastly, even if I select a Comsol, say 5.6. the error changes to: ' LookupError: Could not locate Comsol 5.6 installation.'
It would be great, if you could help me with this issue. Thank you!!!
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "SourceFile", line 168, in com.comsol.model.util.ModelUtil.load File "SourceFile", line 139, in com.comsol.model.util.ServerModelUtil.load File "AccessController.java", line -2, in java.security.AccessController.doPrivileged File "SourceFile", line 1, in com.comsol.model.util.ServerModelUtil$39.run File "SourceFile", line 142, in com.comsol.model.util.ServerModelUtil$39.a File "SourceFile", line 312, in com.comsol.model.util.ModelInternalUtil.load File "SourceFile", line 326, in com.comsol.model.util.ModelInternalUtil.load File "SourceFile", line 1189, in com.comsol.model.util.ModelManager.loadModel File "SourceFile", line 961, in com.comsol.model.util.ModelManager.a File "SourceFile", line 984, in com.comsol.model.util.ModelManager.a File "SourceFile", line 1238, in com.comsol.model.util.ModelManager.a File "SourceFile", line 107, in com.comsol.model.util.saveload.AbstractModelLoader.load File "SourceFile", line 185, in com.comsol.model.util.saveload.AbstractMphLoader.a File "SourceFile", line 508, in com.comsol.model.util.saveload.AbstractModelLoader.a File "SourceFile", line 109, in com.comsol.model.util.saveload.AbstractModelLoader.a File "SourceFile", line 218, in com.comsol.model.util.saveload.AbstractMphLoader.b File "SourceFile", line 248, in com.comsol.model.util.saveload.AbstractMphLoader.c File "SourceFile", line 337, in com.comsol.model.util.saveload.AbstractMphLoader.a File "SourceFile", line 588, in com.comsol.model.util.saveload.AbstractMphLoader.d File "SourceFile", line 3143, in com.comsol.model.dbmodel.ModelDb.postLoadInitialize File "SourceFile", line 3275, in com.comsol.model.method.ModelMethod.doPostLoadInitialize File "SourceFile", line 2395, in com.comsol.model.method.ModelMethod.fullVariableUpdate File "SourceFile", line 1657, in com.comsol.model.method.ModelMethod.a File "SourceFile", line 142, in com.comsol.model.util.MultiphysicsLicenseManager.checkOutRequiredLicenses File "SourceFile", line 280, in com.comsol.nativeutil.d.b.e File "SourceFile", line 286, in com.comsol.nativeutil.d.b.a File "SourceFile", line 37, in com.comsol.nativeutil.d.c.a Exception: Java Exception
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "c:/Users/frsc03/py_coms/Comsol.py", line 9, in
model = client.load('capacitor.mph')
File "c:\Users\frsc03\py_coms\mainenv\lib\site-packages\mph\client.py", line 324, in load
model = Model(self.java.load(tag, str(file)))
com.comsol.util.exceptions.LicenseException: Exception:
com.comsol.nativejni.FlNativeException: License error -5 No such product exists
(rethrown as com.comsol.util.exceptions.LicenseException)
Messages:
Could not obtain license for#COMSOL Multiphysics