In new test (creating OnActivate and OnConnect events) I can see that in the remote computer, the TPsOPCProvider doesn’t enter in the OnActivate event.

Then I can connect with an OPC client locally but not remotely.

Is the problem related to the Initialize method?

I think I found the problem… In my server I recover datas from my database. The connection use ADOConnection (using dbGo) to provide datas.

Is it posible that the database conection interact with the provider DCOM object and make the provider to function incorrectly?

I try my code without databse access and it work fine!!!!

So how can I access my database without troubleshooting my provider?

Before this piece of code I create and initialize the provider. In this function I create the server variables:

void CreateSpOPCProviderTags(TStringList* jobs, TMain* main) {
//We generate the tags depending on the SQL data
opcProvider->AddressSpace->AutoAddApplication = false;
opcProvider->AddressSpace->AutoUpdate = false;
opcProvider->AddressSpace->IncludeProps = false;
//we recover the affected machines
DAOConfiguration* daoConfig = new DAOConfiguration();
TStringList* machines = daoConfig->getMachinesActives(jobs);
//The TADOConnection and TADOQuery are deleted => COM object dead
delete daoConfig;
daoConfig = NULL;
//We create the OPC server tags for every machine
for (int i=0; i Count; i++) {
int index = opcProvider->AddressSpace->AddModule(main, -1, “TEST1”, false);
if (index != -1) {
TPsBool* var1 = new TPsBool(NULL);
var1->Value = false;
TPsInteger* var2 = new TPsInteger(NULL);
var2->Value = 123;
TPsString* var3 = new TPsString(NULL);
var3->Value = “Test serveur OPC”;
opcProvider->AddressSpace->AddVariable(index, var1, “VARTEST1”);
opcProvider->AddressSpace->AddVariable(index, var2, “VARTEST2”);
opcProvider->AddressSpace->AddVariable(index, var3, “VARTEST3”);
} else {
ShowMessage(“Can’t create root node for ” + machines->Strings[1]);
}
}
}

With this code I can access my OPC variables through an OPC client locally but not remotely. If I delete the piece of code concerning the database access, I can access in both mode, locally and remotely.