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FreeOpcUa / python-opcua

LGPL Pure Python OPC-UA Client and Server
http://freeopcua.github.io/
GNU Lesser General Public License v3.0
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object.getchild() doesn't work anymore ? "The requested operation has no match to return" #648

Open yacinees opened 6 years ago

yacinees commented 6 years ago

Hi,

First, thank you for this amazing package. I use it a lot for various projects but recently I encountered a problem while coding a new OPC UA server. Second, sorry if my english is not great.

When I create my object "MyObject" with the add_object(index, "MyObject", type) it creates perfectly my object (after having created its proper type of course). When I want to add some variables to the type with the type.add_variable(index, "Variable1", 0 it works also great.

But the problem appears after I have instanciate all of this. When I want to get a child by specifying its name with my_object.get_child(["%d:Variable1 %index]) it returns "The requested operation has no match to return" like if the child asked doesn't exist ... This lines of codes worked perfectly for all of my projects since today ...

I have searched in the documentation if there was a change in the package but didn't encountered any response.

If anyone has any idea about this issue, I'll be thankfull !

zerox1212 commented 6 years ago

Does your child have special characters in the browse name?

yacinees commented 6 years ago

No, the name are really simple like "TEMPERATURE", "PRESSURE" and others parameter like this.

The weird thing is that the same method get_child works perfectly with the client library. If I get the objects with the objects = client.get_objects_node() and then do a objects.get_child(["%d:TEMPERATURE", %index] it works really well.

But with the server library it doesn't work anymore ...

zerox1212 commented 6 years ago

Are you using the master branch, or pip?