-1 Exit Code The License Manager PC you used last time is not available now?

Last night, I got a -1 Exit Code in my log when TC runs overnight in FinalBuilder. I am using TC/TE 10. My silent log turned up this... Does anyone know possible reasons of why the license manager PC might not have been available?

12/27/2015 20:39:41:868 Tried to open the YES/NO dialog. Message: Do you want to close the Project Suite without saving changes?. The default value: YES.
12/28/2015 16:32:24:200 The License Manager PC "TESTING-764" you used last time is not available now.
12/28/2015 16:34:01:306 The License Manager PC "TESTING-764" you used last time is not available now.
12/28/2015 16:42:10:464 Tried to open the Save dialog. The default value: YES.
12/28/2015 16:42:10:464 Tried to open the Save Read-Only Storage dialog. The default value is wpcCancel.
12/28/2015 16:42:10:464 Tried to open the YES/NO dialog. Message: Do you want to close the Project Suite without saving changes?. The default value: YES.
12/28/2015 17:27:36:137 Tried to open the Save dialog. The default value: YES.
12/28/2015 17:27:36:147 Tried to open the Save Read-Only Storage dialog. The default value is wpcCancel.
12/28/2015 17:27:36:147 Tried to open the YES/NO dialog. Message: Do you want to close the Project Suite without saving changes?. The default value: YES.
12/28/2015 18:00:28:862 Tried to open the Save dialog. The default value: YES.
12/28/2015 18:00:28:862 Tried to open the Save Read-Only Storage dialog. The default value is wpcCancel.
12/28/2015 18:00:28:862 Tried to open the YES/NO dialog. Message: Do you want to close the Project Suite without saving changes?. The default value: YES.
12/28/2015 19:29:30:047 Tried to open the Save dialog. The default value: YES.
12/28/2015 19:29:30:057 Tried to open the Save Read-Only Storage dialog. The default value is wpcCancel.
12/28/2015 19:29:30:057 Tried to open the YES/NO dialog. Message: Do you want to close the Project Suite without saving changes?. The default value: YES.
12/28/2015 20:37:49:044 Tried to open the Save dialog. The default value: YES.
12/28/2015 20:37:49:054 Tried to open the Save Read-Only Storage dialog. The default value is wpcCancel.
12/28/2015 20:37:49:054 Tried to open the YES/NO dialog. Message: Do you want to close the Project Suite without saving changes?. The default value: YES.
12/28/2015 21:02:12:792 Tried to open the Save dialog. The default value: YES.
12/28/2015 21:02:12:802 Tried to open the Save Read-Only Storage dialog. The default value is wpcCancel.
12/28/2015 21:02:12:802 Tried to open the YES/NO dialog. Message: Do you want to close the Project Suite without saving changes?. The default value: YES.