Film developing problem

I have a question, I haven't developed any B&W film for almost three years and I did the other day. The problem is that when it got done the film had those purple areas on it. I have forgotton what that means, but i think it has to do with the fixer. Also, i developed my very first IR roll and it had yellow areas which i think are the IR equivalent of the purple areas. does anybody know what I can do to fix this problem and if I am right about the yellow on the IR film?

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