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OPC-UA Exception

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15 Jan 2014 15:42 #1667 by adid@contel.co.il
Replied by adid@contel.co.il on topic OPC-UA Exception
yes this is the problem.

thank you,
Adi Damty

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15 Jan 2014 15:04 #1666 by support
Replied by support on topic OPC-UA Exception
Hello.

Is your "nodeId" variable always non-null?
The following user(s) said Thank You: adid@contel.co.il

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15 Jan 2014 14:25 #1665 by adid@contel.co.il
Hello,

i get this error :

Precondition failed.: NodeDescriptor != null, Stack trace : at OpcLabs.EasyOpc.UA.UANodeArguments.set_NodeDescriptor(UANodeDescriptor value)
at CI_OpcInterface.WCFService.ServiceBaseLogic.ReadMultipleTags(List`1 i_Tags, Boolean i_ThrowExceptionIfPartOfReadingFailed)


on this lines :

foreach (TagInfo taginfo in i_Tags)
{
nodeId = GetNodeId(taginfo.UAEndpointDescriptor, taginfo.TagName);

tagsNames.AppendFormat(@"[{0}] , ", taginfo.TagName);

uaReadArgument = new UAReadArguments();
uaReadArgument.EndpointDescriptor = taginfo.UAEndpointDescriptor;
uaReadArgument.NodeDescriptor = nodeId;
uaReadArguments.Add(uaReadArgument);
}

when i do uaReadArguments.Add(uaReadArgument); for some tags.

what is does this exception means?

thank you,
Adi Damty

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