How to fix the Oracle error PLS-00236: Invalid external type specification for string.?

In this post, you’ll learn more about the Oracle ErrorPLS-00236: Invalid external type specification for string. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PLS-00236: Invalid external type specification for string.

Reason for the Error PLS-00236: Invalid external type specification for string.

The external type specified is not valid for one of the following: INDICATOR, LENGTH, MAXLEN, TDO, DURATION, CHARSETID, or CHARSETFORM.

How to fix the Error PLS-00236: Invalid external type specification for string. ?

You can fix this error in Oracle by following the below steps

Check the manual and specify an appropriate external type.