'Upgrade Odoo V12 --> V15 (CE)

Currently, I'm using Odoo 12 community version on my local system now I want to upgrade from Odoo 12.0 to Odoo 15.0 (CE).

I tried online but it's asking Enterprise subscription code.

When I tried with command as given below giving me following error. python3.7 <(curl -s https://upgrade.odoo.com/upgrade) test -d -t 15.0

Unable to get the subscription code of your database. Your database must be registered to be eligible for an upgrade.

Anyone, please help me, I would be very thankful. Thank You



Solution 1:[1]

Upgrade feature is available only for the Odoo Enterprise customers. You can try https://github.com/OCA/OpenUpgrade or convert your Odoo version to Enterprise

Solution 2:[2]

Your real column1/2/3/4 are probably not columns in a single data frame - as those must be in uniform length. Anyway, if these are the true sizes the naive solution shouldn't hog an impossible amount of memory (~126M):

d <- expand.grid(column1, column2, column3, column4)
all.sums <- mapply(sum, d[[1]], d[[2]], d[[3]], d[[4]])

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Paxmees
Solution 2 Ofek Shilon