Oracle Message ORA-26051 - internal error parsing packed decimal format string

ERRORinternal error parsing packed decimal format string
CAUSEA packed decimal field with a non-zero scale factor is mapped to a character column. In order to perform the datatype conversion, a numeric format string must be created based on the input fields precision and scale specifications. Direct path loader encountered an error in creating this format string.
ACTIONExamine the packed decimal fields precision and scale specifications and make sure that they contain valid values.