unable to export .... resolution too high??

[MsMonny]

Hi
hoping someone here can help.  I am trying to export a file for Society 6.  One of the products needs to be 3700 x 7400px.  There are many others that have larger sizes.  
So, I have my design.  I scaled it to match the px.  My artboard is exactly the same size.  I then go to 'export as' and I get a couple different messages.  One is 'the operation cannot complete because of an unknown error (now).'
Or that the resolution is too big.
I have not had any trouble with resolutions this size before.  I have even had an a4 sized file and it saved just fine.
Only started this weekend.
My normal go-to for saving is 
* export as
* png or jpeg
* 300dpi
* maximum quality
any ideas as to what is happening??
New to Ai, so laymans terms would be appreciated.  🙂

[MsMonny]

have no idea how to edit my post!!!
I am using the newest version of Adobe CC.

[Ton Frederiks]

If you need 3700 x 7400px export at 72 ppi to keep those pixel sizes.

[MsMonny]

Thanks for your reply.  Unfortunately I need to import an image that is 3700 x 7400 at 300dpi (it will not accept 72dpi). Is there any way around this?  I am importing into Society6 (a Print On Demand website for products).  Can I somehow save it/export it into Ps and then try to save at 300dpi?

[Ton Frederiks]

Open the file in Photoshop, Image > Image Size...

Set the resolution to 300 and uncheck Resample.

Save the file.

[MsMonny]

Thank you 🙂