[GUSDEV] running GUS plugins - potential problem

[Deborah P. <pi...@pc...>]

Hi All,

Recently, GusApplication.pm (ga) was modified and an argument, 
workflowstepid,  was added to the argument list. Under some 
circumstances this will cause a plugin to fail with the following error 
message:

FATAL: The plugin is declaring an argument named 'workflowstepid', but 
that argument was not present when the plugin was last registered.

Here's an explanation:
      When plugins are first run in a database instance or when they are 
updated with a new svn version number, they are "registered" in the 
database and there are values stored in the core tables including the 
set of parameter names the plugins can take which are stored in 
core.algorithmparamkey table. These include parameters they inherit from ga.
      If you do an svn update of GUS,Gus/PluginMgr, or ga directly, ga 
will be updated and will have the new parameter, workflowstepid. If  you 
then try to use  a plugin that you have  previously run (it was already 
registered and will not have workflowstepid as one of its 
core.algorithmparamkeys rows), the plugin will fail with the error given 
at the top of this mail. 
      If the plugin has a new svn version number or you've never run it 
in that db instance, there will not be a problem. The plugin wil be 
registered with all the parameters including workflowstepid.

Here's a work-around:
      If you do update ga and re-run a plugin that fails as described 
above, you can get around the problem. First, try to do an svn update of 
the plugin and if there is an update, build and you'll be able to run 
it.  If the plugin isn't updated, edit it to have an inconsequential 
change (e.g. insert a blank line) and commit it to svn and build. Again, 
the problem will be solved.

Debbie