Foreground of terminal prompts initialization of board failed in software upgrade process at some conference sites, a lot of board software running error appears at foreground and displays “TOO MANY FILES OPEN”. But the original edition software runs normally.
Modify the file amount that system could open at the same time according to the prompt of host. Edit “configure.sys” file, change “File=30” into “File=50”, problem solved, board startups normally.
There is no problem with upgrading on other terminal with the software and the board has no hardware faults, so, there must be something wrong with operating system of terminal itself, according to the prompt from foreground, caused by too much application runs by the software after upgrading.