For some reason when I run custom cron groups I get the following error (note this is using IIS on Windows which is not officially supported).

php bin/magento cron:run --group=custom

Windows cannot find 'C:\Program'. Make sure you've typed the name correctly


start /B "magento background task" C:\Program Files (x86)\PHP\v7.0\php.exe "c:\dev\bin/magento" cron:run
--group=custom --bootstrap=standaloneProcessStarted=1 2>&1

If I run the cron tasks which are part of this group as the default group I do not get this error.


This can be solved by adding

php bin/magento cron:run --group=custom --bootstrap=standaloneProcessStarted=1

Found this through this blog

As you can see, this command is running for index group tasks and the flag –bootstrap=standaloneProcessStarted=1 means that any child process has not been created, otherwise there could happen that each command creates Crons for all the groups and the process would enter an infinite loop.

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