# Problem Upgrading OEE Demo from 7.6 to 7.7.1

**URL:** <https://forum.inductiveautomation.com/t/problem-upgrading-oee-demo-from-7-6-to-7-7-1/9603>\
**Category:** 3rd Party Modules\
**Created:** [January 27, 2015, 12:25am UTC](https://forum.inductiveautomation.com/t/problem-upgrading-oee-demo-from-7-6-to-7-7-1/9603 "2015-01-27T00:25:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![miketob](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/miketob/32/5936_2.png) [@miketob](https://forum.inductiveautomation.com/u/miketob)\
**Post date:** [January 27, 2015, 12:25am UTC](https://forum.inductiveautomation.com/t/problem-upgrading-oee-demo-from-7-6-to-7-7-1/9603/1 "2015-01-27T00:25:24Z")

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Hello,

I am trying to upgrade the OEE demo included in version 7.6 to the new 7.7 version but I am getting an error:

What I did was:

1. Installed Ignition 7.6+OEE module
2. Configured OEE Module and Installed the demo
3. Tested the demo (it worked ok)
4. Upgraded to 7.7.1.
5. Tested the demo again and found this problem:

The problem is with the Auto Schedule Gateway script, I’m getting this error on the log:

```auto
Traceback (most recent call last): File "<TimerScript:OEEDemo/Line Auto Scheduler @60,000ms >", line 29, in <module> File "<module:app.AutoSchedule>", line 14, in autoSchedule at com.sepasoft.production.server.opc.OPCProductionServer.read(OPCProductionServer.java:172) at com.inductiveautomation.ignition.gateway.opc.OPCManagerImpl$ServerWrapper.read(OPCManagerImpl.java:707) at com.inductiveautomation.ignition.gateway.opc.OPCManagerImpl.read(OPCManagerImpl.java:433) at com.inductiveautomation.ignition.gateway.script.GatewayOPCUtilities.readValues(GatewayOPCUtilities.java:42) at com.inductiveautomation.ignition.gateway.script.GatewayOPCUtilities.readValuesImpl(GatewayOPCUtilities.java:37) at com.inductiveautomation.ignition.common.script.builtin.AbstractOPCUtilities.readValue(AbstractOPCUtilities.java:41) at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) java.lang.NullPointerException: java.lang.NullPointerException
```

I reviewed “Line Auto Schedule gateway script Line 29” and “app.AutoSchedule Line 14”, and I also checked the Machine paths and OPC paths and everything looks fine.

Is there something that I’m missing?

Thank you

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<div class="post-metadata">

**Author:** ![miketob](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/miketob/32/5936_2.png) [@miketob](https://forum.inductiveautomation.com/u/miketob)\
**Post date:** [January 29, 2015, 1:07am UTC](https://forum.inductiveautomation.com/t/problem-upgrading-oee-demo-from-7-6-to-7-7-1/9603/2 "2015-01-29T01:07:10Z")

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Ok, it seems that the line paths needed to be modified from:

OEEDemo\Your Enterprise\Site 1\Packaging\Line 1

to

[global]\Your Enterprise\Site 1\Packaging\Line 1

in the gateway timer script

Now it works ok.