Clients may receive FLEXlm -16 errors if IPv6 support is installed on a Microsoft Windows 2003 License server

Technote (troubleshooting)


Problem(Abstract)

Once Internet Protocol version 6 (IPv6) support is installed on an IBM Rational License Key Server host running Microsoft Windows 2003 server, clients using Internet Protocol version 4 (IPv4) will not be able to connect to the license server.

Symptom

The client error messages may include:

Cannot read data from license server (-16,287)

FLEXnet Licensing error:-2,413

FLEXnet Licensing error:-15



Cause

According to the Chapter 5 of the FlexNet Publisher Licensing Toolkit version 11.6 Administrator's guide, this behavior is expected on Windows XP and Windows 2003 license servers.

"If the license server runs on Windows XP or Windows Server 2003, there are certain limitations because of the limited dual-layer support on these operating systems. IPv4 FLEXenabled clients cannot communicate with an IPv6 license server running on these operating systems."


This manual can be accessed at: http://www.globes.com/support/fnp_utilities_download.htm


Diagnosing the problem

On the license server, run ipconfig /all. If you observe output like the following, ipv6 is enabled:






Pinging the host by its name may also show that an IPv6 address is used as well.

Pinging myhost [fe80::bdb5:e7e7:d09b:52f0%9] with 32 bytes of data:
Reply from fe80::bdb5:e7e7:d09b:52f0%9: time<1ms
Reply from fe80::bdb5:e7e7:d09b:52f0%9: time<1ms
Reply from fe80::bdb5:e7e7:d09b:52f0%9: time<1ms
Reply from fe80::bdb5:e7e7:d09b:52f0%9: time<1ms

Resolving the problem

At this time, the only known solution is to uninstall IPv6 support in Windows 2003 server. The command to do this is netsh int ipv6 uninstall and a reboot of the server will be required.

Related information

Flexera Software utility and documentation downloads
netsh commands for IPv6 support

Rate this page:

(0 users)Average rating

Add comments

Document information


More support for:

Rational License Key Server
Rational License Key Server

Software version:

8.1.1

Operating system(s):

Windows

Reference #:

1516145

Modified date:

2011-10-26

Translate my page

Machine Translation

Content navigation