Problem in 'Case 300' in MATPOWER

[jnv484]

Hello,

I want to perform some calculations for IEEE-300 bus systems such as 
getV0, makeYbus, etc. After executing the 'runpf' or 'loadcase' commands 
for case300,

mpc=loadcase(case300);
mpc.bus;

The bus number in the first column of mpc.bus has the following problem:
         1
         2
         .
         .
         .
         250
         281
         319
         320
         322
         323
         324
         526
         528
         531
         552
          .
          .
          .

        9533
Till bus number 250, the results are okay, then somehow the bus number 
shows the wrong numbers as shown above. Eventually, all the other 
commands required to perform calculations give errors.

Kindly, please suggest a solution to this problem, if any.

Thank You,
Jay Nayak
Research Assistant
University of Regina
Regina, SK, Canada.