The following warnings occurred:
Warning [2] Undefined array key 2907 - Line: 275 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 275 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined array key 2914 - Line: 275 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 275 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined array key 2916 - Line: 275 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 275 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined array key 2921 - Line: 275 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 275 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined array key 2939 - Line: 275 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 275 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $thread - Line: 295 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 295 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Trying to access array offset on value of type null - Line: 295 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 295 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $fid - Line: 295 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 295 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined array key 2939 - Line: 331 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 331 errorHandler->error_callback
/inc/plugins/threaded_mode.php 332 ThreadedMode::buildtree
/inc/plugins/threaded_mode.php 332 ThreadedMode::buildtree
/inc/plugins/threaded_mode.php 332 ThreadedMode::buildtree
/inc/plugins/threaded_mode.php 332 ThreadedMode::buildtree
/inc/plugins/threaded_mode.php 304 ThreadedMode::buildtree
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $theme - Line: 3 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 3 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Trying to access array offset on value of type null - Line: 3 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 3 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $theme - Line: 3 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 3 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Trying to access array offset on value of type null - Line: 3 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 3 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $lang - Line: 5 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 5 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Attempt to read property "messages_in_thread" on null - Line: 5 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 5 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks





Flakey HP41CX clock?



#6

Anyone else had this problem? I have two HP41CX's, one is a halfnut. Both seem to suffer from a lack of robustness in the clock department. On powering up, I sometimes find the clock has reset itself to 00.00.00 etc. Yet the stack registers are all preserved ok. Are the clock registers less robust in the face of minor battery interruptions or is there another factor at work? Similarly, if the battery is down - "BAT", the clock by design won't come on - fair enough. But if one inadvertently asks for the clock display, surely this should not lead to a clock reset. How long can the clock keep time 'batteries out'. The regular memories go on for days in this condition.


#7

>>>Anyone else had this problem? I have two HP41CX's, one is a halfnut. Both seem to suffer from a lack of robustness in the clock department. On powering up, I sometimes find the clock has reset itself to 00.00.00 etc. Yet the stack registers are all preserved ok. Are the clock registers less robust in the face of minor battery interruptions or is there another factor at work? >> Similarly, if the battery is down - "BAT", the clock by design won't come on - fair enough. >> But if one inadvertently asks for the clock display, surely this should not lead to a clock reset. How long can the clock keep time 'batteries out'. The regular memories go on for days in this condition. <<

Boy, I'm sorry. It's been quite a while since I played with one of these to any great extent. Another possibility is get your manual out and double check all the user flags status. Also, much less likel;y, there may be some quirk in a program causing this condition even if it is totally unrelated to any time function. Good luck and let me know if anything happens.


#8

I just subjected my 41CX to a 10 second power disruption (similar to changing batteries I guess) and the clock continued to run. (well, I didn't lose the time)

How long did it take to lose the time?


#9

Thanks Steve. For the '85 CX halfnut with regular N cells, time sometimes has been disrupted without even removing batteries, clock will read e.g. 3 am, implying it got reset on its own 3 hrs ago. For the '83 CX with the rechargeable pack (83120A) when the low battery icon comes on, if I inadvertently request clock time the display blanks (by design?) to not show clock when the battery is low, HOWEVER after recharging the clock has reset itself. Maybe I'm just unlucky enough to have two different problems, but I notice the stack registers are always retained in both cases when this this happens - so why does the clock register fail first? It doesn't seem to relate directly to a 10 second or longer battery disconnect.


#10

Last night I went looking for my CX manuals in order to try to find out how long the clock would work without batteries (and other conditions). Unfortunatly the manuals have gone into hiding :-(

Your problem does sound a bit like a fault to me. Perhaps the capacitor in the CX that holds power during battery replacement is dead or dieing and it is causing the problem?

But to two CX's that you happen to own??? And as to why the rest of the calculator doesn't die....?

Do you have any corrosion on the battery contacts?

Has the calculator been repaired or modified?

I don't think I can offer even a slightly educated guess. It's weired. Keep us informed if you do find the cause.


Possibly Related Threads…
Thread Author Replies Views Last Post
  HP Prime - Revision Suggestion - Setting the Clock Bill Triplett 5 2,099 11-15-2013, 12:36 AM
Last Post: Joe Horn
  Prime incase anybody missed the clock Dougggg 5 1,915 10-19-2013, 04:05 PM
Last Post: Geoff Quickfall
  Using your HP-65 as a clock! Don Shepherd 24 6,177 10-08-2013, 11:53 AM
Last Post: Don Shepherd
  HP41CX: Strange serial #... Stephan Matthys 1 1,132 09-13-2013, 01:38 PM
Last Post: Stephan Matthys
  WP-34s clock program Andrew Nikitin 8 2,563 06-09-2013, 11:20 PM
Last Post: Andrew Nikitin
  Cool math clock Bruce Bergman 28 7,560 04-10-2013, 03:13 AM
Last Post: Siegfried (Austria)
  hp clock does not talk to hp 71 Hans Holzach 15 3,922 07-29-2012, 04:13 PM
Last Post: Hans Holzach
  Using PIL-BOX & ILPer to Transfer Programmes from PC to HP41CX? Michael Lopez 5 2,201 06-25-2012, 09:31 AM
Last Post: Michael Lopez
  OT: Mechanical CPU clock Ethan Conner 1 1,087 04-19-2012, 01:23 AM
Last Post: Mike Morrow
  [WP34s] Accurate Clock Katie Wasserman 1 998 04-08-2012, 01:25 AM
Last Post: Walter B

Forum Jump: