Video Foundation Blade - problems with VSI_FILE

Hello, I've got problems with the COPY command which copies objects from an external source (e.g. another directory) into the storage component - in this case the file system. One expects that as a result of COPY there is a new file that has the same content as the source file. The file is there, only that it's size is USUALLY 7 byte - the first 7 byte of the source file. Sometimes the resulting file contains only a part of the source file and on very rare occasions COPY works fine and the whole file is copied. I registered the storage component to be directory /tmp/: (see also Video Foundation Datablade documentation pp 3-10) insert into medvsiregister values (medstorage('VSI_FILE', 2, NULL, NULL, NULL,'/tmp/', NULL, NULL)); insert into medvsi_file values ('/tmp/',0); create table media (name lvarchar, val MedLoc); insert into media values ('test', copy('VSI_CLIENT:/tmp/test', storage('VSI_FILE#2:'))) Copy returns a value of type MedLoc. Afterwards table media contains the correct information. /tmp/test can be binary or text, reside on a different directory or machine - neither works. There are no errror messages. What is going wrong? Thanks in advance for your help, joachim