This error is very typical if your source file is too large to process. The typical solution is to increase memory_limit limits accordingly or split your dataset into multiple MPG projects. There is no particular recommended size of the memory_limit that we recommend as it solely depends on your data source file. I.e. if your data source file has only 500 records, even 1mb should be enough. However if you have 100 columns and 150,000 rows, your memory_limit would need to be 256mb or even 512mb.
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