# Build failed for sdk7.7.8

**URL:** <https://forum.inductiveautomation.com/t/build-failed-for-sdk7-7-8/11579>\
**Category:** Module Development\
**Created:** [April 26, 2016, 11:15am UTC](https://forum.inductiveautomation.com/t/build-failed-for-sdk7-7-8/11579 "2016-04-26T11:15:28Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![PRAMANJ](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pramanj/32/66935_2.png) [@PRAMANJ](https://forum.inductiveautomation.com/u/PRAMANJ)\
**Post date:** [April 26, 2016, 11:15am UTC](https://forum.inductiveautomation.com/t/build-failed-for-sdk7-7-8/11579/1 "2016-04-26T11:15:28Z")

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Hi I am trying to compile my module for SDK 7.7.8 on 64 bit version of Ignition 7.7.8. I get following error on build:

BUILD FAILED

C:\Ignition-ModuleSDK-7.7.8\gatewaycomm\Build\build.xml:83: java.io.FileNotFoundException: [localhost:8088/main/system/Devel ... ingServlet](http://localhost:8088/main/system/DeveloperModuleLoadingServlet)

Line 83 of xml is:

I created the module skeleton as NOT FREE check box.

Please help!

regards  
Prafull

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**Author:** ![PRAMANJ](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pramanj/32/66935_2.png) [@PRAMANJ](https://forum.inductiveautomation.com/u/PRAMANJ)\
**Post date:** [April 27, 2016, 3:06am UTC](https://forum.inductiveautomation.com/t/build-failed-for-sdk7-7-8/11579/2 "2016-04-27T03:06:40Z")

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could the two issues be related to CD\_KEYS which I forgot to initialize? Also for OPC activation there is a separate key required if I remember. Both keys can be generated on line I remember, but there is provision for only one License key activation in Ignition I guess, so whcih key should I enter there? Will the OPC key be valid for developer mode key as well?

regards  
prafull

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<div class="post-metadata">

**Author:** ![PRAMANJ](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pramanj/32/66935_2.png) [@PRAMANJ](https://forum.inductiveautomation.com/u/PRAMANJ)\
**Post date:** [April 27, 2016, 3:26am UTC](https://forum.inductiveautomation.com/t/build-failed-for-sdk7-7-8/11579/3 "2016-04-27T03:26:33Z")

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Yes the BUILD failed was due to missing Developer License key.  
However the OPC Tag read exception from OPC client error still remains!

Is it due to OPC activation License , how to activate the OPC server access from an OPC Client?

I remember there was an option to activate OPC on the Ignition portal somewhere, but that seems to be missing now!

Help will be appreciated.

regards  
prafull

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<div class="post-metadata">

**Author:** ![PRAMANJ](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pramanj/32/66935_2.png) [@PRAMANJ](https://forum.inductiveautomation.com/u/PRAMANJ)\
**Post date:** [April 27, 2016, 3:57am UTC](https://forum.inductiveautomation.com/t/build-failed-for-sdk7-7-8/11579/4 "2016-04-27T03:57:30Z")

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Got it, even the OPC issue was related to CD\_KEY. I retrieved the key from an old mail from Travis Cox and activated it in this version and it worked! I have forgotten steps as I performed these steps after a long time!

Best Regards  
Prafull

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<div class="post-metadata">

**Author:** ![PRAMANJ](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pramanj/32/66935_2.png) [@PRAMANJ](https://forum.inductiveautomation.com/u/PRAMANJ)\
**Post date:** [April 27, 2016, 10:29am UTC](https://forum.inductiveautomation.com/t/build-failed-for-sdk7-7-8/11579/5 "2016-04-27T10:29:08Z")

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The OPC UA key was old, I generated a new one and problem resolved.

regards  
Prafull