[SOLVED] SONAR no longer working on my DAW, I thought it might keep working longer ...

OK, so I found out about the death of SONAR about a month ago, but haven't had time to scope out either Samplitude Pro X or Studio One Pro cross-grades I bought. Reality bites, you can't buy time ...
 
Anyway, I just tried creating a new project to mix my last gig capture in SONAR.  I got the dreaded "disk may be full error" and another about a bad parameter; reboots don't help, making a new project doesn't help ...  The DAW PC has tons of disk space; it's fine. It'll open an play the old SONAR projects just fine. 
 
Anyway, SONAR is already having issues, I can open old projects and play them,  but cannot import WAV files into new projects - FRACK!  Time to scope out the cross-grades I bought, eh? I thought it might continue to work just a little bit longer. 
 

I would guess that it's something system specific, over here I 've got Cakewalk Home Studio 2004, (released in late 2003), and Cakewalk Guitar Tracks Pro 3, (released in early 2004) both installed and running on windows 10 64 bit on both my desktop and my laptop, the old VST adaptor program doesn't work, but the core programs and the old basic Cakewalk DX plugins are working fine.

Could the files be importing way to the right on the timeline? If so, they are broadcast wav files and SONAR is set to Always Import Broadcast Waves at Their Timestamp.

If there's a serious issue with Sonar then we would have loads of people coming here with the same problem. Anyway hope you are backing up with something like Acronis True Image.

All of my important PCs have battery backups and scheduled Acronis backups, although, this feels like a "go forward"  situation since my Studio DAW seems to be working fine as-is, I can record and mix right now and it works perfectly, but it can't seem to digest the WAV files created on my other PA System PC. 
 
I think I'll hop on the PA System PC and export the tracks in a different format and then try importing those into my DAW. I might get that PC up to date with Windows Update first.  

OK, I finally got down to the studio to try some  things ...
 
Yes, the PA System PC is running SONAR, but that PC doesn't have my arsenal of Wave's Plug-ins, so the template is different. I usually create a new project on the DAW PC and drag/drop the files in, or copy/paste between two projects. 
 
I just now figured out the root cause of my troubles and it's kind of embarrassing, so much so that I almost didn't post a follow up ... I literally had one of my many drives near full and SONAR just didn't deal with it gracefully; that's it. I checked and checked late last night, but I have many hard drives on this DAW, I was tired, and must have had my eyes crossed.  After a full night's sleep it was blatantly obvious what was going on. 
 
Thanks for your help everyone! 

Given several solutions were offered even though they didn't apply to you, you might want to add [Solved] to the title to help others who have what they think is the same issue.