# Basic info <!--- Add commit SHA used to reproduce --> - Float reference: - Encoder (float): de0a9fca93 - Fixed point: - Decoder (fixed): d68c8f8447 # Bug description There is an assert in frame 2417 of BASOP decoder when fed with bitstream from selection material based bitstream of MASA generated with float encoder using DTX and rate switching. The stack trace:  This issue might be related to #1218 but happens in different place in the function. # Ways to reproduce Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1220 <!-- Commandline or script --> Use this command line with the bitstream provided in Box ```bash IVAS_dec EXT 48 test_2006.bs 2006_BASOP_Selection_P800-8b_cat2.wav_generic_start_384k_20frames_48-48___EXT.wav ``` For reference, also inputs are provided in Box and you can use this command line to generate the bitstream with float encoder ```bash IVAS_cod -masa 2 BASOP_Selection_P800-8b_cat2.met -max_band wb -dtx generic_start_384k_20frames.bin 48 BASOP_Selection_P800-8b_cat2.wav test_2006.bs ``` <!--- Below are labels that will be added but are not shown in description. This is a template to help fill them. Add further information to the first row and remove and add labels as necessary. -->