MATLAB: Error in smimport(‘ ‘) command: Illegal use of reserved keyword “end” AND Attempt to execute SCRIPT smimport as a function

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Hello. I tried to import a CAD model from solidworks (xml file format) to simsape multibody, using the smimport command. The command does not seem to work as i get the following error:
Error: File: smimport.m Line: 170 Column: 1
Illegal use of reserved keyword "end".
When i click on the error the following file appears:
Does anyone knows what is this error?
I then tried to run the matlab as administrator and delete the 'end' from line 170. Then i got a different error:
>> smimport('sm_Assem.xml')
Attempt to execute SCRIPT smimport as a function:
C:\Program Files\MATLAB\R2018b\toolbox\physmod\sm\import\m\smimport.m
I have no idea what is this script file and i am afraid i will mess it up if i try to modify it.
Any help would be really appreciated.
Thank you