Finding the prefix used for caravel subcells in the user GDS.
User prefix is TJ_
Replacing cell caravel in the user GDS file.
Reading GDS file for alternate cell caravel
Cell caravel found at position 235669746
Cell caravel ends at position 247680056
Reading GDS file for original source ./gds/caravel_00010010.gds
Cell caravel found at position 2515993382
Cell caravel ends at position 2528003096
Cell caravel checksum is 12009686
Info:  Structure caravel at 2515993382 to 2528003096 has checksum 12009686 != 12009824 (checksum failure)
Prefixing caravel subcells in the user GDS
Running:  /usr/share/pdk/bin/change_gds_string.py user_id_textblock TJ_user_id_textblock copyright_block TJ_copyright_block open_source TJ_open_source storage TJ_storage sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped TJ_sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped user_id_programming TJ_user_id_programming simple_por TJ_simple_por gpio_control_block TJ_gpio_control_block mgmt_core TJ_mgmt_core mgmt_protect TJ_mgmt_protect chip_io TJ_chip_io user_project_wrapper TJ_user_project_wrapper ./gds/caravel_00010010_c.gds -debug -verbatim
Traceback (most recent call last):
  File "/usr/share/pdk/bin/change_gds_string.py", line 72, in <module>
    with open(source, 'rb') as ifile:
FileNotFoundError: [Errno 2] No such file or directory: './gds/caravel_00010010_c.gds'
Finished.