Warning: This works for less than 10% of FPRG files. Most are compiled binary. Assuming you have secured access to Forecast Pro (even a free trial), here is the exact workflow for a perfect conversion.

Ensure your FPRG file is not corrupted. If the file size is 0 KB, conversion is impossible.

Here is the technical reality: A PDF (Portable Document Format) has a specific internal structure—headers, object tables, cross-reference tables, and trailers. An FPRG file contains proprietary binary data or XML structures unique to Forecast Pro.