CUPSFILTER command generating 0KB pdf file when used in Oracle forms

Hi All

We are using "cupsfilter" command to convert a text file to pdf, on Oracle forms application server which is linux (Red hat 8.9).

Below is the command we are using to convert 'rep_txt.txt' file to 'rep_pdf.pdf' file:

cupsfilter -o cpi=17 -D \forms\abc\rep_txt.txt > \forms\abc\rep_pdf.pdf

Above command is creating the pdf file successfully with correct content but when we use the same command in Oracle forms(12c) using host function then it is creating pdf but of 0KB size.

Need your help to resolve this.

Any other solution(without using RDF) to convert text to pdf on application server is also welcome.