Generally, if you have run a program containing MAP_PROJ_INIT successfully in the IDL Development Environment, but it fails in IDL Runtime in a '.sav' program that you build around the same time, it is because a .RESET_SESSION event has occurred since your successful run without a subsequent RESOLVE_ALL. You should be careful to closely follow the instructions that begin in the article "Creating SAVE Files of Program Files" in IDL Online Help's Contents tab page path 'IDL Programmers' Guides > Application Programming > Part I: Application Programming > Creating SAVE Files of Programs and Data'.
James Jones
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