How to import tab delimited file into IBM DB2 UDB table

I need to import tab delimited data into a DB2 UDB table. Character strings are not delimited.
The import command fails

IMPORT FROM "mytable.del" OF DEL MODIFIED BY COLDEL0X09 MESSAGES "mytable.log" INSERT INTO mytable;

Fails with a message for each row

SQL3116W  The field value in row "1" and column "2" is missing, but the target
column is not nullable.

I have checked the input file and it does have tab characters delimiting fields so it would appear that the lack of character string delimiters is causing a problem.

I have tried CHARDEL"" along with COLDEL0X09 with same result (as expected, I guess).

The import file was produced by another IBM product, iSeries Access for Windows data transfer facility.

Question: How import a tab delimited file with no character string delimiters into a DB2 UDB table.