Application Engine Fatal SQL Error in PeopleCode

 I am working on an Application Engine program to inactivate vendors from a CSV file attachment.  I am able to read the file and get the vendor IDs in the file to inactivate, but when the SQLExec runs it always fails with a Fatal SQL error.Any idea why? If I take the update statement and run it directly in SQL Plus it works.

my code is as follows: 

Local File &FILE;

Local SQL &SQL;

Local array of string &AS;

Local string &ATTACHSYSFILENAME = NI_VNDR_IN_AET.ATTACHSYSFILENAME;

Local number &update_count = 0;

Local string &VendorID;

Local string &fileSysPath = GetEnv("PS_SERVDIR") | "/files";