There are syntax errors in vcpe scripts like if [[$? -ne 0]]

./vnfs/vCPE/scripts/v_bng_build.sh:45: if [[$? -ne 0]]
./vnfs/vCPE/scripts/v_bng_build.sh:65: if [[$? -ne 0]]
./vnfs/vCPE/scripts/v_bng_build.sh:79: if [[$? -ne 0]]
./vnfs/vCPE/scripts/v_brgemu_build.sh:38: if [[$? -ne 0]]
./vnfs/vCPE/scripts/v_brgemu_build.sh:49: if [[$? -ne 0]]
./vnfs/vCPE/scripts/v_brgemu_build.sh:59: if [[$? -ne 0]]
./vnfs/vCPE/scripts/v_brgemu_build.sh:186: if [[$? -ne 0]]