Product Version = NetBeans IDE 7.4 (Build 201310111528)
Operating System = Windows 7 version 6.1 running on amd64
Java; VM; Vendor = 1.7.0_40
Runtime = Java HotSpot(TM) 64-Bit Server VM 24.0-b56

Win7
gcc 4.8.2 (cygwin)

The error is not critical only annoying.

After removing a value from an enum, recompiling and correcting errors, then recompiling without error, Netbeans retains the error indication and error messages for the missing enum value.

For example:
 o o o
enum xyz { A = 1, B - 2 };

 o o o

if  (xyz::A) then o o o

and changing to:

 o o o 

enum xyz { B = 2 };

 o o o

if  (xyz::A) then o o o   // will be in error. Correcting to:

if (xyz::B) then o o o  // the error indication remains although the compilation is successful.