1. WELCOME!
 
2. just to note step 1 helps with new,  not existing files.
 
3. 64,770 Items   is your issue.  You're at the end of item space!
 
many easy solutions.
 
#1  eccomagic classic tool  (eccomagic.com  also in eccotools.com board)  will copy/cut items WITH ALL FOLDER VALUES so you can simply paste them into another archive file without *any* info loss.
 
#2 you can copy hundreds (even thousands) of items into a magicview page (see magicview thread in eccotools board)  and  archive them that way.  (once in MV page,  delete the items from file).   note: this does not save folder values for archived items.
 
#3 you can combine shorter items into larger 'archive' items using the eccomagic classic tool. (copy and paste as new item with 'soft' returns).
 
 
all these tools have pretty lengthy trials so you can fix your file freely.
 
 
Answers:
 
1.  Yes,  would for sure expect to be an item count issue.   File may or may not be corrupted but would deal first just with item count,  you've reached the limit of ecco items,  essentially.
 
2. Would fix item count FIRST,  that should solve your issues.  Then add some great tutorials to help others with your extensive ecco knowledge,  and get a helpware EM-ADT (you'll like it).  Then test copy of your file for corruption.
 
3. Your super clear and organized questions casts this quick answer to you as almost inadequate!   You can use either tool to reduce your items.  Both approaches allow full searching but reduce line count.
 
with the eccomagic classic tool,  you just copy those items you want to 'archive'  and then paste into new item with control + Shift + v  and presto!  you've turned many items into 1.  (you can get about 30,000 characters into any single item this way,  it only takes up 1 item pointer).
 
 
similarly,  with the magicview extension  you can mark one or more items,  use Winkey + Control + C  and copy directly those items into the active magicview page.  There is no limit as to the size or number of ecco items you archive this way.  
 
 
 
3.  Would not suggest deleting older content.  At minimum, use the eccomagic tool to cut & paste (with folder values) into archive file.  That way you don't lose anything.
 
reformatting older outline subparts into large single item blocks  or placing them in a MV pane are typical resolutions to issue.
 
 
PERSONAL SUGGESTION/TIP:
 
IF YOU HAVE FORMATTED DATA (BOLD,COLORS, UNDERLINE, ETC.)  IT IS BEST TO USE THE SLANG EXTENSION WHEN COPYING ITEMS INTO MAGICVEW.
 
would use a COPY of your file when doing this.  (you can open a MV page in one file,  then open another file and copy from the second file into the MV page of the first).
 
by using the Slang extension,  you can clip to MV all of the outline structure, formatting, etc.  it is nice.
 
 
hope clear to helpful.
 
 

Great questions.
 
1. As a general matter yes.  
 
2. Yes, but remember folder values are not retained.
 
3. You've got YEARS of experience with ecco and outlining structures, etc.  You'd be amazed how helpful what you can share would be to others..
 

thanks for the help. I found this forum really helpful for troubleshooting ecco