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I ran into this with a few files if I remember correctly. It is easily fixed by adjusting the "!- Maximum Number of Warmup Days" under the "Building" Object," (should be line 81 of the .idf file) to a higher value. Try 30, review the error file and if you are still having issues try something like 100 or 1000. If you look at the error file, you will probably find out that the convergence limit error is for a space that is not directly conditioned, such as a closet, or bathroom. In my experience, this has not seemed to have a noticeable effect on the results output.