Erro: The parameter ("p_fieldname" here) can be up to 8 characters long

hi,

When activating our program, get error at the following statement:

PARAMETERS: p_fieldname LIKE Z_tablename-fieldname Default Value 'abc '.

And the error msg is:

The parameter name ("p_fieldname" here) can be up to 8 characters long.

In our table Z_tablename, the field fieldname is defined with Type: Char. and the Lengh is 4. Why we've got this msg? how to resolve it?

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