IMP-00020: long column too large for column buffer size??

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importing and getting this error.
why would I get this error if there is no LONG column on the table???

error:

. . importing partition "METER_INTERVAL":"D2003_09_23"
IMP-00020: long column too large for column buffer size (30)
. . importing partition "METER_INTERVAL":"D2003_10_15"
IMP-00020: long column too large for column buffer size (30)