Hi @Mohan Raman,

Thank you for reporting this. We attempted to reproduce the issue on our end but were unable to. To help us investigate further, we'd appreciate your assistance with the following:

1. Could you share a screen recording of the issue occurring?

2. Was the Libraries panel open while performing operations on the canvas? If so, could you try the same steps with the Libraries panel closed and let us know if the behavior changes?

3. Based on the comments, it appears the issue involves Illustrator becoming increasingly slow and eventually hanging during grid repeat creation. To help us narrow down whether this is specific to that workflow, could you check if similar slowdowns occur with other operations — such as applying a raster effect to an object, or using freeform gradient with multiple stops?

Your inputs will help us identify the root cause. Thank you for your patience and cooperation.

i was working on a print artwork file using object > pattern > make > i spent five hours on it, but the program suddenly crashed. when i reopened illustrator the file was not recovered.

The file opens in ~5 seconds for me, no hiccups, on a pretty average Windows 10 machine, with Intel i7 4470 3.4GHz, RAM 24GB, Nvidia GeForce GTX 1050Ti
Both Repeat objects above the artboard are live. I think putting a repeat into a repeat is what slows it all down. It works, but not very responsive.
Creating a pattern from a grid repeat object didn’t work well, the pattern’s module is now too big and slows Ai down.

So I released both huge repeats above, made some edits into your main pattern module, cleaned up some paths, for the seamless gaps between tiles... the wavy ribbons still don’t tile vertically, but it’s up to you to make them so :)
The file now is ten times lighter, and should at least open for you. Hope this helps!

A general piece of advice, based on my personal practice, — it’s better avoiding complexity. Ai would certainly allow it, and creating it is fast, but most times it’s not necessary and can choke any computer.

Nope. whenever I use the repeat grid command, AI freezes and does not respond. it has been one week; please fix it

...an 'endless repeat grid'? ...can you share the document with it, please?
Again, is this the only file you can’t open?

I used version 30.2.1 the still issue continued. I developed an endless using the 'repeat' 'grid' command in AI (Adobe illustrator). The program freezes and then recovers after some time. buy it restarts from the beginning. how can i fix this?

@Mohan Raman - some more queries to understand your side of setup better.
1. Tell us about your OS version. Has there been any recent updates to OS?
2. Are you able to launch Illustrator without opening any files?
3. Is the issue happening for each file? Are you able to create new files and save them?

Mohan, are you on 30.1.2 version? Did it start happening with the upgrade or not?
Are you able to create new files, or does Ai freeze only when opening old ones?
If you reset your Preferences — does it help?