FNDGFU

hi

I am using the shell script to execute the below

v_file_id=$1
v_file_name=$2
FNDGFU apps/apps 0 Y DOWNLOAD=$v_file_id /tmp/$v_file_name

once i execute the file getting the message as below

Log filename : L5846630.log

Report filename : O5846630.out
ORA-01722: invalid number

log file does not have any information on the error.

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If i hard code the values 

v_file_id=213445
v_file_nam=Test.pdf
FNDGFU apps/apps 0 Y DOWNLOAD=$v_file_id /tmp/$v_file_name

the file is not downloading

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but 
if i try as below

v_file_id=$1