yes this is the problem.

thank you,
Adi Damty

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