45 deg elbows disappearing??

Hello everyone,

I am having trouble with routing 45 deg elbows. I have a 90 deg elbow as my default so I browse to the location of the 45 deg elbow. I choose the one I need and it is put in place. However if I need to change the spool later on, even if the change has nothing to do with the elbow it says that I have to select the elbow again. I choose the exact same elbow, but I get a message up saying  "The selected elbow fitting does not have a configuration with the following dimensions .... and the fitting cannot be added" I do not understand why this is happening because the changes I implemented had nothing to do with the elbow. Can Someone Help me?? I have emailed Intercad also, but I tend to find you guys are a lot quicker, and reliable

Cheers

SolidworksRouting