Problems accessing the manufacrurer dll
I am trying to communicatete a Gigahertz-Optik optometer using dll file provided by the manufacturer. I have Labview 7.1 and operating on Windows 2000. After a proper function is selected in the "Call library Node" and excpected assignments done, the program crashes.
The error message reads, "An exception occurred within the external code called by a Call
Library Node. This may have corrupted LabVIEW's memory. You should save
any work to a new location and restart LabVIEW. VI "xyz.vi" was stopped
at Call Library Function Node 0x448 of subVI "called-function.vi" ".
I have attached my program and a header file provided by the manufacturer. ANy help would be appreciated.
Attachments:
HCT99HID.H 8 KB
Optometer Library Function Call-Open USB.vi 14 KB
Can't access the DLL, but my guess is that it's because you're not providing a string to use as the buffer for the error message. Unless the DLL creates this dynamically, it's probably expecting you to pass in a buffer. I would try wiring in a string of adequate length. I would also change the parameter from LStrHandle to just a C string pointer.
I would strongly suggest that you should look at the shipping examples, as there's a very good example that shows you how to call functions in a DLL using a variety of parameters.
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AddCharset ISO-10646-UCS-4 .ucs4
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no I didn't get error messages as the relevant lines for reading/writing where between try statements, but you were where right it was/is just a simple path problem.
I expected the refering directory without using a path to be the directory where the servlet is in, but it is not !!??
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Multiple classes accessing the same DLL???
This behaviour is completely unacceptable.
Let's visualise my app:
There a 2 java classes:
ClassA:
public String[] getPaths(){
return getNativePaths();
public native String[] getNativePaths();
static{
System.loadLibrary("mylib");
} ClassB:
public void setPaths(String[] paths){
setNativePaths(paths);
public native void setNativePaths(String[] paths);
static{
System.loadLibrary("mylib");
} MainClass:
public void testA(){
ClassB clsB=new ClassB();
String paths[]={"c:\\test.txt"};
clsB.setPaths(paths);
public void testB(){
ClassA clsA=new ClassA();
String paths[]=clsA.getPaths();
public void testC(){
ClassA clsA=new ClassA();
String[] paths=clsA.getPaths();
clsA=null;
ClassB clsB=new ClassB();
clsB.setPaths(paths);
}Method testA and testB in MainClass don't pose any problems, they work fine. :)
But when calling testC, I get this:
java.lang.UnsatisfiedLinkError: no mylib in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1403)
at java.lang.Runtime.loadLibrary0(Runtime.java:788)
at java.lang.System.loadLibrary(System.java:832)
...ClassA and ClassB both work good if used separately (another thread). But if we call one after another (same thread), an exception is thrown.
So, what's the problem here?
Is it the return of a string array?1 remark:
If I do this:
ClassA clsA=new ClassA();
ClassB clsB=new ClassB();
clsB.setPaths(clsA.getPaths());This works, but if you call the dll again after this, you'll get the same exception over and over again.
I think it has something to do with the release of strings (cause there isn't any).
My native code that returns an array of Strings:
jobjectArray strArray=null;
strArray=env->NewObjectArray(nSize,env->FindClass("java/lang/String"),env->NewStringUTF(""));
// loop
env->SetObjectArrayElement(strArray,nCount,env->NewStringUTF(dlg->GetNextPathName(pos)));
nCount++;
return strArray; -
Need help configuring VPN - problems accessing the networks
Hi everyone, hope someone can help me out here.
I'm administering the network for our small company. We basically have two sets of machines - public ones with fixed net addresses (mail, web, dns servers, etc), and private ones behind a wireless router/nat.
Our main need here is to be able to VPN in to the public side, in particular, the mailserver, so that we can get around all the stupid things that get done to SMTP when we connect at the BedBug Inn ("Free wifi, administered by gibbons").
Secondarily, it would be nice to be able to connect to and browse some of the internal machines.
So here is what I did:
* Installed 10.4.10 Server on a machine with two ethernet interfaces, one that has a public IP address, the other connects into the private network. When I'm actually at that machine, things work fine - I can browse the private network shares, connect to the net, etc.
* Configured VPN. I have no problems getting a VPN connection, both sides are happy. The VPN assigns incoming clients IP addresses in the private network IP range, but outside those assigned by the wireless router's NAT.
* Added 192.168.2.1/255 (the private network) and 12.17.29.193/224 (the public network) to the Network Routing Definition box under VPN/Settings/Client Information.
However, here's where it all falls down. Once the VPN is established, I can't connect to any of the public machines, and the only private-side device that seems to respond is the Wireless/NAT box (A Belkin N1). So the only thing I can do is administer the Belkin remotely, which, while nice, is not exactly what I had in mind.
Doing a traceroute while VPN is active to my mailserver shows the first hop direct to the VPN machine, then off into * * * heaven (though I have no idea if traceroute works over VPN!).
One curious note: when I change the order of the Network Routing Definitions so that the public network comes first, and the private one second, I can't contact the Belkin box.
Any advice, oh wise and powerful masters of technology?
Various, but the server is running on a G4 Mac OS X (10.4.10)I said:
"let's assume I VPN to the wireless box"
You replied:
"That's not correct as it is not the device running the VPN endpoint - in this case. "
But wouldn't I have to (on the VPN client) specify the public IP of the wireless box in order connect (because the packets are forwarded) to the actual OS X box running the VPN? Otherwise, it can't see it.
Part of the problem I have is that I can't dedicate a whole machine to VPN. The OS X machine running VPN is also running DNS, and will eventually run our mailserver and perhaps FTP, web, etc, as I slowly migrate stuff to it.
So this machine has to have a public IP address. It cannot be hidden behind the wireless NAT. And it seems to me that this is the crux of the problem. What I think you are telling me is that if the VPN machine was entirely hidden behind the wireless NAT, and had no direct public (WAN) interface, then since all the packets destined for the outside world (including my public servers)would have to go through the NAT, and all would be OK.
If so, then it seems to me that the best solution is to use something like OpenVPN on another OS X (not OS X Server, since I only have one of those) machine in the private network. Since the incoming VPN traffic will be Mac only, it shouldn't be an issue, L2TP-only is fine.
"Otherwise you have to run NAT and the firewall in the VPN server too and use private IPs for VPN clients - or use "only" it (remove the other NAT box and put it on the LAN only). Using only one device for NAT/gw means less configuration."
It is entirely unclear to me, in my setup, what effect turning on NAT on the VPN box (or perhaps, just IP forwarding) would have -- and if I do turn on NAT, would I still have the VPN assign IP's to clients in the internal private network's range, or would I use a different range (ie: private is 192.168.237.xxx, VPN assigns 192.168.239.xxx) and expect the NAT to handle the conversion?
I'm a bit leery of just trying it and seeing what happens because it if mucks things up so badly that the server becomes unreachable (via server admin), I'll have to schlep down to the office to fix it.
"Other things to consider is "bottlenecks" between your LAN and WAN."
Not a real issue. We have a small office, and a relatively small pipe to the internet. Most of the traffic from that pipe is from the public machines anyway. The traffic that goes through the wireless router is basically websurfing and hitting the mailserver.
I could, of course, use the VPN OS X machine as the NAT/DHCP server, and hang the wireless router off the internal network as a simple access point. But would that resolve all the VPN issues?
Once again, thanks for your helpful and prompt replies. -
Problems accessing the internet via wifi
I'm not able to access internet via wifi but am connected to my wifi network.
No problems when using 3G
I guess it is a dns problem?
when i check the wifi settings IP address and subnet mask
have details but is blank for router, dns and search domains.
What details should I input there?
Would it mess anything up if I used the same settings that my iphone uses?
I know wifi is ok because I can download books to my ipad with stanza using wifi.
Sorry don't know too much about this sort of thing
diannediannef wrote:
yes IP address begins with 169
HTTP proxy is set to off
I am using a Time Capsule.
Have a macbook pro
and two iphones connected with no problems
Is their a limit to no. of devices that can connect?
Yes, this would be determined by the size of the IP pool allocated on your time capsule router. Ordinarily this should be large enough by default to accommodate the number of devices you have.
Not sure where to check
"If DHCP is not working for you then you should check to see if your router is set to do DHCP and that MAC address filtering is not turned on"
*First, please note that if you aren't really familiar with network setup you should probably give Apple support a call and they can walk you through this.* See: http://www.apple.com/support/expert/
You can access your Time Capsule router using the Airport Utility which is found in the Applications/Utilities folder on your Macbook Pro. If you use this utility you can see how your router is setup. Post what you see here, i.e., Network name, radio mode, channel, Security password protection (WPA2 personal is best), etc. Of course, don't post any passwords.
Don't forget to check that the IP Address selector in your iPad WiFi setting for your network (which can be DHCP, BootP or Static) is set to DHCP.
I will turn Time capsule off for a while to try.
At this point it might also be a good idea to also go to Settings > General > Reset on your iPad and select "Reset Network Settings". -
Problems accessing the parallel port
Dear All,
I'm having problems to access to the parallel port using the VI write /
read to the serial port, it returns the error code 37. As far as I've
seen in the documentation this error code is for UNIX systems and we're
using Windows 95.
Anybody know what's going on?
Cheers,
Ernest
Ernest Mendoza
Institut de Ciencia de Materials de Barcelona
Consejo Superior de Investigaciones Cientificas
Campus de la UAB. E-08193 Bellaterra (Barcelona)
Tel- 34- 93 580 18 53
Fax- 34- 93 580 57 29
http://www.icmab.es/dmag/new/index.htmlThis is the device not found error. It is platform independant. It means
that you are addressing a serial port that LabVIEW cannot find. This is
becuase the port is not there or LabVIEW cannot access it. Make sure the
serial port you are addressing is configured in Windows device manager and
then make sure you have the file serpdrv in your LabVIEW (or compiled executable)
directory.
-Jim
Ernest Mendoza wrote:
>Dear All,>>I'm having problems to access to the parallel port using the
VI write />read to the serial port, it returns the error code 37. As far
as I've>seen in the documentation this error code is for UNIX systems and
we're>using Windows 95.>>Anybody know what's going on?>>Cheers,>>Ernest>>>-->____________________________________________
_______>>Ernest
Mendoza>Institut de Ciencia de Materials de Barcelona>Consejo Superior de
Investigaciones Cientificas>Campus de la UAB. E-08193 Bellaterra (Barcelona)>Tel-
34- 93 580 18 53>Fax- 34- 93 580 57 29>http://www.icmab.es/dmag/new/index.html>___________________________________________________>> -
How can I access the driver DLL,s from Matlab or Java?
I would like to access a DAQpad-6016 from Matlab or Matlab via Java objects or via c-files. Is it any support for that? Is it any DLL-files to download or c-code? \Ake
Hi Ake!
I think the 6016 supports NI-DAQmx. If so, I started a thread
http://forums.ni.com/ni/board/message?board.id=250&message.id=10165
(opens in new window) that explains how to import the NI-DAQmx dll into Matlab.
I'd be happy if it works for your card, too.
Jens
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