Latex files conversion failed

I have couple of Latex files and trying to convert to PDF and its failed.
Attached file having 16 different cases, please let me know what is the cause of the issue.

Multiple Cases files.zip (100.6 KB)

@SuryaRaju

We have logged an issue as PDFNET-47356 in our issue tracking system for the sake of detailed investigation. We will surely investigate reasons behind such issues and keep you informed on the status of ticket resolution. Please be patient and spare us little time.

We are sorry for the inconvenience.

we are planning to buy the product if gaps/issues are resolved at the earliest.
Please let us know the tentative date for the fix.

@SuryaRaju

The issue has been logged under free support model where priority is used to be low and issues are resolved on first come first serve basis. However, we have recorded your concerns and will definitely consider them during issue investigation. We will surely let you know as soon as there are some updates about its fix. Please spare us little time.

We are sorry for the inconvenience.