Repro steps don't seem to be exact, but it happens pretty reliably.
Open some *.e file.
Open big find dialog.
Enter some term which appears multiple times in the file.
Check "Incremental" and "List all occurrences".
Press F3.
Check MatchColor (exactly which colors don't seem to matter).
Press F3
Slickstack.
Sometimes I get the stack when I toggle Incremental and press F3 again.
Anyways, here are several different stacks I hit in trying to pin down the repro steps.
stack[2017-08-07T10:17:17Z] Slick-C STACK TRACE ******************************
stack[2017-08-07T10:17:17Z] Created on 8/7/2017 at 10:17:17 (593 ms)
stack[2017-08-07T10:17:17Z] SlickEdit Pro Version 22.0.0.1 Copyright 1988-2017 SlickEdit Inc.
stack[2017-08-07T10:17:17Z] Edit module and type "st -f <offset>" to get the
stack[2017-08-07T10:17:17Z] run-time error position
stack[2017-08-07T10:17:17Z]
stack[2017-08-07T10:17:17Z] error code=-2073
stack[2017-08-07T10:17:17Z] This property or method is not allowed on this object
stack[2017-08-07T10:17:17Z]
stack[2017-08-07T10:17:17Z]tbfind.ex 14064 tbfind:_tbfind_OnFindNext(0) p_window_id: 383 p_object: OI_IMAGE p_name: _findcolormenu
stack[2017-08-07T10:17:17Z]tbfind.ex 13547 _tbfind_form.c_a_c_z() p_window_id: 383 p_object: OI_IMAGE p_name: _findcolormenu
stack[2017-08-07T10:18:11Z] Slick-C STACK TRACE ******************************
stack[2017-08-07T10:18:11Z] Created on 8/7/2017 at 10:18:11 (609 ms)
stack[2017-08-07T10:18:11Z] SlickEdit Pro Version 22.0.0.1 Copyright 1988-2017 SlickEdit Inc.
stack[2017-08-07T10:18:11Z] Edit module and type "st -f <offset>" to get the
stack[2017-08-07T10:18:11Z] run-time error position
stack[2017-08-07T10:18:11Z]
stack[2017-08-07T10:18:11Z] error code=-2073
stack[2017-08-07T10:18:11Z] This property or method is not allowed on this object
stack[2017-08-07T10:18:11Z]
stack[2017-08-07T10:18:11Z]tbfind.ex 14064 tbfind:_tbfind_OnFindNext(0) p_window_id: 382 p_object: OI_CHECK_BOX p_name: _findcolorcheck
stack[2017-08-07T10:18:11Z]tbfind.ex 13547 _tbfind_form.c_a_c_z() p_window_id: 16 p_object: OI_EDITOR p_name:
stack[2017-08-07T10:18:16Z] Slick-C STACK TRACE ******************************
stack[2017-08-07T10:18:16Z] Created on 8/7/2017 at 10:18:16 (56 ms)
stack[2017-08-07T10:18:16Z] SlickEdit Pro Version 22.0.0.1 Copyright 1988-2017 SlickEdit Inc.
stack[2017-08-07T10:18:16Z] Edit module and type "st -f <offset>" to get the
stack[2017-08-07T10:18:16Z] run-time error position
stack[2017-08-07T10:18:16Z]
stack[2017-08-07T10:18:16Z] error code=-2073
stack[2017-08-07T10:18:16Z] This property or method is not allowed on this object
stack[2017-08-07T10:18:16Z]
stack[2017-08-07T10:18:16Z]tbfind.ex 14064 tbfind:_tbfind_OnFindNext(0) p_window_id: 401 p_object: OI_CHECK_BOX p_name: _findinc
stack[2017-08-07T10:18:16Z]tbfind.ex 13547 _tbfind_form.c_a_c_z() p_window_id: 362 p_object: OI_PICTURE_BOX p_name: _findframe
stack[2017-08-07T10:20:11Z] Slick-C STACK TRACE ******************************
stack[2017-08-07T10:20:11Z] Created on 8/7/2017 at 10:20:11 (232 ms)
stack[2017-08-07T10:20:11Z] SlickEdit Pro Version 22.0.0.1 Copyright 1988-2017 SlickEdit Inc.
stack[2017-08-07T10:20:11Z] Edit module and type "st -f <offset>" to get the
stack[2017-08-07T10:20:11Z] run-time error position
stack[2017-08-07T10:20:11Z]
stack[2017-08-07T10:20:11Z] error code=-2073
stack[2017-08-07T10:20:11Z] This property or method is not allowed on this object
stack[2017-08-07T10:20:11Z]
stack[2017-08-07T10:20:11Z]tbfind.ex 14064 tbfind:_tbfind_OnFindNext(0) p_window_id: 397 p_object: OI_CHECK_BOX p_name: _findlist_all
stack[2017-08-07T10:20:11Z]tbfind.ex 13547 _tbfind_form.c_a_c_z() p_window_id: 362 p_object: OI_PICTURE_BOX p_name: _findframe
stack[2017-08-07T10:22:03Z] Slick-C STACK TRACE ******************************
stack[2017-08-07T10:22:03Z] Created on 8/7/2017 at 10:22:3 (89 ms)
stack[2017-08-07T10:22:03Z] SlickEdit Pro Version 22.0.0.1 Copyright 1988-2017 SlickEdit Inc.
stack[2017-08-07T10:22:03Z] Edit module and type "st -f <offset>" to get the
stack[2017-08-07T10:22:03Z] run-time error position
stack[2017-08-07T10:22:03Z]
stack[2017-08-07T10:22:03Z] error code=-2073
stack[2017-08-07T10:22:03Z] This property or method is not allowed on this object
stack[2017-08-07T10:22:03Z]
