mpirun error for various commands in LIGGGHTS

Hello,

I am getting the following error when I try to define a third particle in addition to the first two particles already being defined. The same error also occurs when I try to insert an if-then statement. Please help.

#distributions for injection
fix pts1_1 all particletemplate/sphere 15973 atom_type 2 density constant 1175.0 radius constant 0.01
fix pdd1 all particledistribution/discrete 74573 1 pts1_1 1.0
fix pts1_2 all particletemplate/sphere 49081 atom_type 3 density constant 2000.0 radius constant 0.001
fix pdd2 all particledistribution/discrete 80489 1 pts1_2 1.0
fix pts1_3 all particletemplate/sphere 24358 atom_type 4 density constant 1175.0 radius constant 0.011
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mpirun has exited due to process rank 0 with PID 8778 on
node TSPL-086 exiting improperly. There are two reasons this could occur:

1. this process did not call "init" before exiting, but others in
the job did. This can cause a job to hang indefinitely while it waits
for all processes to call "init". By rule, if one process calls "init",
then ALL processes must call "init" prior to termination.

2. this process called "init", but exited without calling "finalize".
By rule, all processes that call "init" MUST call "finalize" prior to
exiting or it will be considered an "abnormal termination"

This may have caused other processes in the application to be
terminated by signals sent by mpirun (as reported here).
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