Enable modules in specific order

I noticed that when I enabled Chart 6.x-1.0 and Google 6.x-1.0 at the same time, it returned this error at cron.

require_once(./sites/all/modules/cck/theme/theme.inc) [function.require-once]: failed to open stream: No such file or directory in /home/mysite/public_html/sites/all/modules/cck/content.module on line 177

Seems to me that in the Charts module, Google requires something from Chart that is not present when you enable the modules at the same time.

I then disabled the modules and then enabled them one at a time and it worked. I'm sure that enabling modules one at a time is probably standard procedure.

If you do enable the modules at the same time and cron returns the above error, cron may get stuck and give this error.

Attempting to re-run cron while it is already running.

If this happens, your dblog will always show this error when cron is run. I did the following and it worked. I know this has been posted elsewhere but a lot of the threads are long and confusing. :)

• First disable the modules that caused the error (in my case Chart and Google)
• 1) In your database: go to the variables table and delete the "cron_semaphore" row
• 2) Stay on the variables table and delete the "cron_last" row
• 3) Clear your cache
• 4) Try enabling the modules again, one at a time.

Sorry if this post is super obvious. If it's not maybe it could be noted on the documentation.