IDL Problem Code 87 with alias illegal-hash-op

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Execution Error

This is a fatal error that prevents IDL from compiling or running code

This problem, using types, identifies when you are using hashes in a way that is not allowed.

For example, when you try to add a hash and a list together:

a = hash() + list()
;   ^^^^^^^^^^^^^^^ illegal hash op

To fix, correct your statement or re-write your code:

a = hash('my-list', list())
;   ^^^^^^^^^^^^^^^^^^^^^^^ OK!