Randy, you need to release FRX2Any object between calls. Do not reuse same FRX2Any object. Here is the schema how you can use FRX2Any to merge newly converted to PDF file report with an existed PDF file:
1. Convert 1st report into PDF file – 1.PDF. Release FRX2Any object.
2. Convert 2nd report into PDF file and merge it with 1.PDF, newly created PDF is - 12.PDF. Release FRX2Any object.
3. Convert 3nd report into PDF file and merge it with 12.PDF, newly created PDF is - 123.PDF. Release FRX2Any object.
4. Convert 4th report into PDF file and merge it with 123.PDF, newly created PDF is - 1234.PDF. Release FRX2Any object.
5. Convert 5th report into PDF file and merge it with 1234.PDF, newly created PDF is - 12345.PDF. Release FRX2Any object.
And so on.