Deepstream error

I am getting error when I am trying to run a sample config

./deepstream-app -c …/samples/configs/deepstream-app/config_infer_primary_nano.txt
** ERROR: main:655: Failed to set pipeline to PAUSED
Quitting
ERROR from src_bin_muxer: Output width not set
Debug info: /dvs/git/dirty/git-master_linux/deepstream/sdk/src/gst-plugins/gst-nvmultistream/gstnvstreammux.c(2283): gst_nvstreammux_change_state (): /GstPipeline:pipeline/GstBin:multi_src_bin/GstNvStreamMux:src_bin_muxer
App run failed

Any thoughts?

Please use config, samples/configs/deepstream-app/source8_1080p_dec_infer-resnet_tracker_tiled_display_fp16_nano.txt
the config you used is for nvinfer only, you need config i mentioned for deepstream-app.