-bash: [: =: unary operator expected

Hello
I'm using a cluster session with redhat operating system
recently i have got this problem when i enter to my session

WARNING: 'gcc' was not found
-bash: [: =: unary operator expected
Copyright (C) 2009-2014 Intel Corporation. All rights reserved.
Intel(R) Inspector XE 2015 (build 379161)
-bash: [: =: unary operator expected
Copyright (C) 2009-2014 Intel Corporation. All rights reserved.
Intel(R) VTune(TM) Amplifier XE 2015 (build 380310)
-bash: [: =: unary operator expected
Copyright (C) 2009-2014 Intel Corporation. All rights reserved.
Intel(R) Advisor XE 2015 (build 380555)
WARNING: 'gcc' was not found
WARNING: 'gcc' was not found
WARNING: 'gcc' was not found


additionally when i try any command i got :
Segmentation fault

how to solve this problem