[94] Invalid use of Null

Hi again,



I've got a strange problem with the ServersCheck Software.

Some of the SERVICES checks return the Error "[94] Invalid use of Null" but the same tests work on an other server without problems. The server which return these errors is our Exchange 2007 Server.

What can I do to get theses checks working on our server?



Kind regards

1) Go to the command prompt

2) In the command prompt, navigate to the agents subdirectory of the main ServersCheck directory

3) Save the following file in that agents subdirectory

http://files.serverscheck.net/conf/services.conf

4) Open it with notepad and modify it to your settings

5) Launch following:

service_check services



It should create a file called services.log



Reply with the output of that log file

Hi,

I've got a question before I can reply the output.



In the services.conf under the agents subdirectory which setting I have to use?



1. IP Adress of the remote machine on which the check fails or the IP of the ServersCheck Appliance?

2. Should it be the same Logon-Credentials like the check that fails?

3. What does A:WINS8 means? What I have to put in there when I'm using Windows Server 2003?



Kind regards

- Needs to run on the appliance ; IP is the host being monitored

- Same credentials like the failing

- A: indicates a service and behind the short service name you would like to monitor. For example for the World Wide Web Server this would be W3SVC

Hi again,



I've tested now the monitoring of the service "DHCPServer" on two different machines.



Following entrys have been made in the services.conf.



Machine-Name

Domain Admin

Password

s:DHCPServer





On the machine where the check fails I got the output

Error : [94] Invalid use of Null



On the other machine where the same service is checked I got the output: OK



If I use "A:DHCPServer" I get on both machines the Error: "Error : [-2147217394] Invalid namespace "



The problem still exists, that on one machine the check is working and on an other machine the same check fails.



Kind regards

Can you do the same but with a new build of the service_check ?



The debug build can be downloaded here:

http://files.serverscheck.net/debug/service_check.exe



Run it as follows:

service_check services.conf /DEBUG > debug.log



This should create a file called debug.log - kindly reply with its output

Update: run it as follows:

service_check services.conf > debug.log

(so without the /DEBUG switch)

There isn't a "debug.log" file created there is just a new file created called "services.conf .log" and the file contain following message

Error : [-2147220983] Unable to find configuration file.



It seems that there is a problem with your parameters.

Sorry wrong command

service_check services > debug.log

Ok, I tried it now with the new command and a file called "debug.log" was created with following content:



Error : [-2147220983] Unable to find configuration file.

Check:services



The content of the "services.log" wich has been created too is:

Error : [-2147220983] Unable to find configuration file.



It seems that there is still a problem with the parameters.

Ah, I found the mistake! It has to be service_check services> debug.log without a space between the "services" and the ">" !



Here is the output of the debug.log



4/9/2010 12:46:36 PM Retrieving remote wmi object.

Check:services

4/9/2010 12:46:36 PM Enumerating remote services.

Check:services

Error : [94] Invalid use of Null

Check:services



Here is the output of the services.log

Error : [94] Invalid use of Null



Hope it helps to solve the problem.

No idea how to solve this problem?

I am having a similar issue. We have a Blackberry Enterprise server. This server is used in conjuction with Exchange 2003. Some of the monitors in Serverscheck for this monitor work properly, and some others give the same error message you are recieving [94] Invalid use of null. I have tested WMI and cannot find a resolution to this problem. We previously used Alchemy Network Monitor Pro, and it is able to successfully monitor the services on the server. I am hoping that the Serverscheck support staff can find a resolution to this problem.

We have also BlackBerry Professional Software running on the server where the error occours but we are using Exchange Server 2007. Is it possible that the BlackBerry Software causes this problem?

Release 8.2.0 which includes a completly rewritten backend of the SERVICES check and should solve the reported issue - as we have been unable to replicate it, it was decided to rewrite the check type from the ground up.



Also new in release 8.2.0 are the BlackBerry check types

Great, the checks seem to work now ! Thank you

After upgrading to Serverscheck 8.2.0, my issues were also resolved. Thanks so much for fixing this!