Oracle Message SQL*Loader-00304 - Illegal combination of non-alphanumeric characters

ERRORIllegal combination of non-alphanumeric characters
CAUSEThe SQL*Loader control file contains a combination of non-alphanumeric characters that SQL*Loader does not recognize. For example, the combination != is recognized as not equal, but the combination =! is not valid.
ACTIONRemove the unrecognized characters from the control file.