Fatal error upgrading from 3.8.10 to 3.8.11

[Orange20]

Hello all.

ref: https://www.vbulletin.com/forum/foru...8-10-to-3-8-11

I use 3.8.10 completely vanilla, no mods or addons. I'm receiving the following error on Step 4) Visitor Message IPv6 Updates when upgrading form 3.8.10 to 3.8.11.

"Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 608 bytes) in /PATH-REMOVED/class_core.php on line 1245"

Our PhP memory settings are fine, we're running 5.6.30 and MySQL 5.5.29, and our host had the following to say:

"I've created a test php script under the site which intentionally causes an out of memory error. When it is run, the following error is generated:

PHP Fatal error: Allowed memory size of 1073741824 bytes exhausted (tried to allocate 1073741825 bytes)

This is running out of memory at 1GB which indicates that the problems you are having during the VB update must be caused by VB setting the memory limit itself.

There are several places in the code that I can see the memory limit being checked/set, but I couldn't comment on which script it is that is causing this issue. You or your developer would need to investigate this further."

I've tested the upgrade on 3 diff. servers now, all varying configurations. On a local server here I upped all the memory allocations really high, as referenced in the sreenshot attached to this post. Still the same error message on Step 4) Visitor Message IPv6 Updates.

Something somewhere is overriding our memory limits. I've been using vBulletin since 2005 and never had a single problem upgrading. This is the first time I've encountered a problem and I'd really appreciate some advice.

Thanks very much in advance.