Janet, thanks for your reply.
It's not a scanned document. It can also be read by Monarch, but not at one go.
So, when I drag and drop on my monarch 10.5 pro version model,and then select 'Retain Model' option it reads for all the pdfs. But for this PDF, it does'nt read at that time.
However if I dont select 'Retain Model' option and simply drag and drop then it reads the pdf. But then I need to drag and drop the model file .xmod into the project file again to extract the data.
Howver, this process fails in Datapump when it tries to call it.
Do you have any idea, on what can be wrong with the pdf and how I can solve it.