1) Why does 3Delight displays the following message and adds a watermark on the image?

3DL INFO: please complete the ’3delight.config’ file as explained in the License Server Guide

This happens when the 3delight.config file doesn’t contain the "license.server” entry. Please modify that file as explained in Activating a License Key.


2) I tried starting the license server but it says there is “no valid license keys” in the license file. How do I fix this? 

This means that the license file (usually license.dat) provided to the license server doesn’t contain any known license key. This happens if the license key line was not put in the license file. Please open the license file and paste the provided license key inside. If you don’t have a license key please refer to License Installation


3) What does the following  message mean? 

licserver: 2017/10/10 19:57:08: Invalid license key, make sure the file is correctly formatted and saved in plain text.
licserver: 2017/10/10 19:57:08: no valid license keys found in license file ’/Applications/3Delight-13.0.10/license.dat’.


One common cause for this problem is a license.dat file saved in a format other than plain text. Default saving modes for editors such as Word or Text Edit is ‘Rich Text’, which licserver can’t read. To fix the problem, open the file and select ‘Plain Text’ as the file format when saving using the Save As menu.


4) Why does 3Delight displays the following message and stops the render? 

3DL SEVERE ERROR: Unable to contact license server (Connection refused)
3DL INFO: Make sure the license server is running on ’servername’
 

If 'servername' is really the name of the machine entered in the 3delight.config file then probably the license server hasn’t been started. If servername is not the machine specified in the 3delight.config file then it might mean that there is another 3delight.config file that is overriding the one containing the right servername. This might happen if there is, for example, another 3delight.config file in user’s home directory. To assess this, one could set the DL_DUMP_DEFAULTS environment variable and start a render; all loaded 3delight.config files will then be displayed.


5) What do these error messages mean when starting the license server?

unable to bind TCP address 
unable to bind UDP address

There is most likely another license server process already running on the machine. It needs to be stopped first. Some software firewalls can also cause that kind of error.

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