The warning simply means the variable's value is undef.

If $FastaSeqOfDataBase is undefined, then $ArrayFasta[2] is undefined.

If $ArrayFasta[2] is undefined, then the split returned fewer than three strings.

If the split returned fewer than three strings, then $Data contains fewer than two double quotes.

In reply to Re: Use of uninitialized value error by ikegami
in thread Use of uninitialized value error by birdy

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