Data Conversion Issue in SSIS package - Text to GUID

I am developing a SSIS package that will open an Excel spreadsheet and import the data into a database table in SQL Server 2008. When I try to convert the Excel column data type: Unicode String [DT_WSTR] to a unique identifier data type: unique identifier [DT_GUID], I get the following error:

"Invalid character value for cast specification"

What do I need to do to resolve the conversion error?


I used a Derived Column Transformation Editor and to wrap the excel column value in squrly brackets {} in order for the SSIS package to properly convert the Unicode String into a GUID.

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