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I am trying to run the wp-cron.php manually by calling it that way:


Disabling the auto cron function with :


produces the same error.

What could be the issue?

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The question we have to ask upfront: "Why are you calling it manually?". – kaiser Nov 25 '12 at 16:34
Is "invalid secret string" the exact (!) error message? If so, the error isn't caused by WordPress. And what is the parameter "?doing_wp_cron" for? – Ralf912 Nov 25 '12 at 17:40

If you're launching wp-cron manually you don't need the "doing_wp_cron" parameter. The fact that you have it and haven't given it a value is very likely to be what's causing your error.

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