LMS4.0 Error Message : Error in communicating with DCR Server. DCR Server may be down. Please start the DCR Server and then refresh the page.

When you go to Inventory in order to visualize/add/remove the devices, you may receive the error message:

Error in communicating with DCR Server. DCR Server may be down. Please start the DCR Server and then refresh the page.

Solution:

Completely clear a Cisco switch configuration

When you issue the "wr erase" command in order to clear the configuration of a Cisco router, the config.text file will be erased from the flash. Then when you reboot the switch, there will be no configuration. But the Vlans will not be erased from flash because "wr erase" does not delete the vlan.dat file. So if you need to delete the Vlans as well, you need to delete the vlan.dat file manually!

There is an easier but "dangerous" way to get rid of both configuration and Vlans in a Cisco switch by holding the "mode" button for 10 seconds. The LEDs on switch will flash, the files config.text and vlan.dat will be renamed to config.text.renamed and vlan.dat.renamed and the switch will reboot with no configuration and no vlan!