>>>Hi,
>>>
>>>I have a weird one that's been bugging me for a couple days now and I cannot come up with a solution.
>>>
>>>Client has 6 PCs. 4 running Windows XP , 1 on Windows 7 and one on Windows 8.1.
>>>
>>>I have installed my VFP app on all and all are able to connect to a SQL Server database on a server except 1 XP PC.
>>>
>>>I can use the ODBC administrator to create a connection and test the connection successfully, but my application which uses a connection string and code like this:
>>>
>>>m.lnHandle = SQLSTRINGCONNECT(m.lcConnectionString,.T.) &&& 2nd parameter as .T., as the single-connection-per user, shared by remote views
>>>
>>>always sets m.lnHandle to a negative number.
>>>
>>>I have copied the file with the connection string from a working PC.
>>>
>>>I have created a very simple application which just tries to connect using the connection string and it fails too.
>>>
>>>Does anyone have any ideas? In over 100 installs similar to this I have never been able to use ODBC admin successfully and not my code.
>>
>>What is the result from that:
>>

>>m.lnHandle = SQLSTRINGCONNECT(m.lcConnectionString)
>>IF m.lnHandle < 0
>>   AERROR(laError)
>>   MessageBox(laError[1,2])
>>ENDIF
>>

>
>Boris,
>
>(it's deja vu all over again!) ;)
>
>I got it!
>
>It turns out they had McAfee running on this PC (which should not have been). I uninstalled it and can now connect, so I guess that must have had the firewall on and was blocking my program.

You probably could've added your program to the exceptions list rather than simply turning off the antivirus/firewall.