The model designed in ARIS Basic has been completed with one semantic bug. How do I fix the error?

Your BPMN model seems to be lacking an end event.

Demonstrating this with a very simply example, the semantic check encountered something like this:

But according to the BPMN standard you need at least one end event, if there is a start event. The semantic check will not complain anymore, after such an end event has been added:

This should work in your case as well.

As for the PDF output, ARIS Basic offers various reports that allow you to output model graphics as PDF, such as "Export graphic as a PDF (with preview)", "Output model information" or "Create process manual". Just pick the one that suits you best.

Note: If you do a multi-select in the explorer, you actually don't have to put everything into one model. The report "Export graphic as a PDF (with preview", for example, is also capabable of putting multiple models into one PDF file with each getting its own page.

Thanks for your explaination and advice what I should do to avoid the appearance of complaint after semantic check in ARIS-system has been done. 

1. I designed my model that has several object, and every object consists of the elements which are standing took turns until the process is over. Should I insert the element 'end event' at the end of the process for first object?

2. Whether two elements named 'start event' and 'end event' should be located or not in each of the processes for every remaining objects?

I pay your attention  that at present the element named 'start event' has been placed by me at the beginning of the process for first object, and the element named 'end event' has been located only at the end of the last object.

Hi, I continued to work hard over the weekend and managed to correct errors in the objects included in the model, as well as save the images of processes in PDF format.

I'm very grateful for your assistance.