Why I'm getting java null pointer exception Unable to partition by an empty value


After running import job I'm getting this error and job fails to continue

info=[Error: Failure while running task:datameer.dap.common.exception.PartitionException: Unable to partition by an empty value.
Trupti Bhutada


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    Joel Stewart

    This exception commonly occurs when results from a Workbook are configured to be partitioned by a date column and there is one or more rows where the partitioned column is blank or has a null value. If the results are being partitioned, all records are expected to have a properly formatted non-empty date entry so that they can be properly partitioned. 

    If there is a requirement for this particular column to contain empty or null values, remove the partitioning configuration to allow for these types of values in the results. 

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