PDF batch printing

I have been batch printing PDFs for years with the built-in macro function of the Adobe Reader. For any unknown reason this doesn´t work anymore with my current OS / PDF / printer combination. The printer queue is always stuck or even detaches. I have therefore looked for a solution to delay the printing process. Most print utilitites do not help as I can´t delay spooling of print jobs. Here is my final solution – I am starting Acrobat first and send by DDE in long intervals a print command via pdfp

print.cmd
|wj_print.cmd|