Magento 2.0.2 upgrade to 2.0.4 fails at Component Dependency check

[cyuzik]

I have the CE version of 2.0.2 installed on Ubuntu Server 14.0.4 LTS and it's been working fine. Trying to upgrade to 2.0.4 and it fails the readiness check with:

Check Component Dependency
We found conflicting component dependencies. Hide detail

For additional assistance, see component dependency help .

The problem is, there are no details or further clues that I can find. Is there a log file somewhere that might give more detail than this? I have shell access to the server. Everything else passes.

Anyone have any ideas?

[cyuzik]

Following the upgrade guide elsewhere here, I was able to upgrade to 2.0.4 using the shell.

I used the following:

composer require magento/product-community-edition 2.0.4 --no-update
composer update
rm -rf var/di var/generation
php bin/magento cache:clean
php bin/magento cache:flush
php bin/magento setup:upgrade
php bin/magento setup:di:compile

php bin/magento indexer:reindex

Hope this helps someone.

[sengh]

Also saw an upgrade guide somewhere here, with an additional command:

composer update magento/magento-composer-installer
composer require magento/product-community-edition 2.0.4 --no-update

...