I have Firebird 1.53 Classic funning with

This line in Firebird.conf
ExternalFileAccess = Full

After running the below statement I get this error.
What is it?
How can I stop it?

Regards,

Robert.

ISC ERROR CODE:335544344

ISC ERROR MESSAGE:
I/O error for file "C:\EXT_COMM.ASC"
Error while trying to open file
The operation completed successfully.

Statement: CREATE TABLE EXT_COMMODITIES
EXTERNAL FILE 'C:\EXT_COMM.ASC'
( STOREID CHAR(10) CHARACTER SET ASCII
, DEPTCODE CHAR(10) CHARACTER SET ASCII
, COMMODITYCODE CHAR(10) CHARACTER SET ASCII
, COMMODITYNAME CHAR(50) CHARACTER SET ASCII
, ISSENT CHAR(1) CHARACTER SET ASCII
,NEWLINECHAR CHAR(2) CHARACTER SET ASCII
)