Memory Problem with Pro Audio 8

Since years I work here in Germany very satisfied with Pro Audio 8. At the moment I just use it to integrate sylable Karaoke-lyrics into midifiles. Now I have still to put lyrics into some very long Medleys (each 22 minutes long). Now following strange error happens: If I copy the songtext (which is already sylable edited and fits to the melody-notes) into the lyricbox, Cakewalk stopped working with a system-error and it is only possible to restart the Computer with the OFF/ON-switch. I tryed to copy the text in several blocks. No chance. I tryed now to integrate the lyrics first with an other program into the track and would open it in the Cakewalk, now appears following message by trying to open the songtext: "Not enough memory to do that". But I have really enough memory. Maybe there is in Cakewalk not enough memory reserved for the songtext.

Is there adjusted a limit for songtext?

How can I make memory free to integrate the lyrics?

Is there more memory if I update my Pro Audio 8?

thanks in advance and best regards

Jurgen