Dear, I am having the same problem in several pvelite files, without knowing the reason I changed the selected units to psi / ft.
In the company where I work, I use pressure units bar and due to this error I have to make the same model several times without knowing when this problem is going to be generated.
Hope someone can help me.
From already thank you very much.
regards

Under Home tab you can find the Units/Code panel. Selecting a units file converts all the properties in the model to that set of units.

This can also be changed by Tools > Select Units.

Dear Mariog, I was not clear in my message, sorry for my bad english.
the error in the change of units happens when analyzing the model and in the report English units are displayed.
From already thank you very much.

I cannot give you any advice because I'm not able to reconstruct your error.
But I am just a member of this forum.
You should file a Service Request on Smart Support.