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UaClient.isConnected() return true even if UaClient is not ready to be used.
Rank: Member
Joined: 12/1/2014(UTC)
Posts: 19
Thanks: 2 times
Was thanked: 2 time(s) in 2 post(s)
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UaClient.isConnected() return true even if UaClient (m_uaConnection) is not ready.
next code is based on your UaClient example and generate an error:
UaClient *client;
void doSomething()
{
// part 1;
if (client==NULL)
{
client = new UaClient("xxx","yyy");
client.connect();
while (!client.isConnected())
{
// waiting until client connects
// relese resourses;
}
}
//part 2;
if (client.isConnected())
client.ReadSomething(); //!!!!!!!!!!!!!! crush;
}
Where is two possible scenario.
1. If client was previously created. Then everything works fine.
2. if software need to create a new client. It crushes.
Am I doing this wrong?
Thank you.
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Rank: Advanced Member
Joined: 11/28/2014(UTC)
Posts: 37
Was thanked: 13 time(s) in 11 post(s)
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Hi Vladimir,
In general, it's not enough to have a connection. You'll need to create a session before you can read.
Just to make sure we are talking about the same thing: are you trying to re-use the sample code? The sample is intended to be a quick and dirty demonstration of the required workflow, it's probably not a good idea to use it directly as the basis for your own code.
If you can post a more complete code snippet we can give you more specific advice.
Cheers,
Patrick
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Rank: Member
Joined: 12/1/2014(UTC)
Posts: 19
Thanks: 2 times
Was thanked: 2 time(s) in 2 post(s)
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Patrick,
You absolutely right.
I need to wait until session will be created.
Thank you.
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Matrikon OPC Automation Forum
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UA SDK
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UaClient.isConnected() return true even if UaClient is not ready to be used.
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