Running out of memory??

Not sure why but my script simply halts (doesn't do anything) after a few hours of running it. It seems to be complaining about memory issues however it's the only thing I'm running on the laptop that has SSD and 16GB of ram..

here's a snippet of the error:

#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 268435456 bytes for Failed to commit area from 0x0000000701e00000 to 0x0000000711e00000 of length 268435456.
# Possible reasons:
# The system is out of physical RAM or swap space
# The process is running with CompressedOops enabled, and the Java Heap may be blocking the growth of the native heap
# Possible solutions:
# Reduce memory load on the system
# Increase physical memory or swap space
# Check if swap backing store is full
# Decrease Java heap size (-Xmx/-Xms)
# Decrease number of Java threads
# Decrease Java thread stack sizes (-Xss)
# Set larger code cache with -XX:ReservedCodeCacheSize=
# This output file may be truncated or incomplete.