On 9/18/2012 8:40 AM, Paul Gilbert wrote:
I am doing some comparison for which I load both RMySQL and
RPostgreSQL from my own packages TSMySQL and TSPostgreSQL and I am
getting the following warning building a vignette. I think with
package namespaces / S4 definitions it is a bit difficult to generate
a self contained example, at least I have not yet managed to do that,
but I would appreciate any suggestions about what needs to be done.


If someone else identifies your problem, great. Otherwise, have you tried creating a toy package containing only the minimum? If you get that to work, then I'd create a second toy package starting as a full copy of your existing package, then start throwing things out until you find the problem. I know that's a lot of work, but if you use a manual binary search technique (discard roughly half of the package at each step -- or discard first the 90% you think is least likely to contain the problem), it could go fairly fast. If you do it on R-Forge, then it's easy to give others access to your toy examples.


I hope someone else helps you fix this without the route I suggested. If not, I hope this helps. Spencer


Loading required package: TSPostgreSQL
Loading required package: RPostgreSQL
Warning in .simpleDuplicateClass(def, prev) :
  A specification for class "dbObjectId" in package 'RPostgreSQL'
seems equivalent to one from package 'RMySQL' and is not turning on
duplicate class definitions for this class

(I'm using  R version 2.15.1 on Ubuntu.)

Thanks,
Paul

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Spencer Graves, PE, PhD
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Structure Inspection and Monitoring, Inc.
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