This happens fairly regularly. Create an otl (A) that contains another otl (B). Add or delete a parameter to or from B in its type properties and save it.

It always crashes in the same spot:

Crash report from mark; Houdini Master Version 9.1.124
Traceback from Sun Mar 2 12:38:41 2008
Caught signal 11
AP_Interface::coredumpHandler(UTsignalHandlerArg) (??:0)
UT_Signal::UT_ComboSignalHandler:perator()(int, siginfo*, void*) const (??:0)
UT_Signal::processSignal(int, siginfo*, void*) (??:0)
_L_mutex_unlock_17 (??:0)
PSI2_DialogPRM::setParmList(PRM_ParmList*, bool) (??:0)
PSI2_DialogPRM::setOpData(PRM_ParmList*, OP_Node*, bool) (??:0)
OPUI_Dialog::setNode(OP_Node*, bool) (??:0)
FUI_DialogManager::getDialog(OP_Node*, PRM_Template:RM_Export) (??:0)
FUSE_ParmDialog::setDialog(OP_Node*, OPUI_App*, int) (??:0)
FUSE_ParmDialogApp::pathNodeChanged(OP_Node*) (??:0)
OPUI_App:puiSetOpNetPtr(OP_Network*) (??:0)
FUI_NetApp::handlePathChange(UI_Event*) (??:0)
UI_Queue::processNextEvent() (??:0)
UI_Queue::drain() (??:0)
UI_Queue::eventLoop() (??:0)
main (??:0)

is otl B Embedded or is it's definition on disc?

Which version are you running? If you can post a simple A/B asset setup that demonstrates this behavior that would be beyond helpful.

Thanks,
Mark

sorry, took a while to find the minimal reproducible case:

move aside ~/houdini9.1
open houdini
drop a geometry obj
add an attribcreate after the file sop
set name to “foo”
select the attribcreate
collapse to subnet
create digital asset: typename=foo, desc=Foo, file=$HIP/foo.otl, current hip file only
hit Accept
(the type properties pop up)
select Parameters page
dive into the new asset (subnet1)
promote attribcreate1/value1 to the otl's parameters (drag & drop)
hit Accept
go up one level
copy and paste subnet1

crash:

Crash report from mark; Houdini Master Version 9.1.124
Traceback from Mon Mar 3 20:09:11 2008
Caught signal 11
AP_Interface::coredumpHandler(UTsignalHandlerArg) (??:0)
UT_Signal::UT_ComboSignalHandler:perator()(int, siginfo*, void*) const (??:0)
UT_Signal::processSignal(int, siginfo*, void*) (??:0)
_L_mutex_unlock_17 (??:0)
PSI2_DialogPRM::setParmList(PRM_ParmList*, bool) (??:0)
PSI2_DialogPRM::setOpData(PRM_ParmList*, OP_Node*, bool) (??:0)
OPUI_Dialog::setNode(OP_Node*, bool) (??:0)
FUI_DialogManager::getDialog(OP_Node*, PRM_Template:RM_Export) (??:0)
FUSE_ParmDialog::setDialog(OP_Node*, OPUI_App*, int) (??:0)
FUSE_ParmDialogApp::pathNodeChanged(OP_Node*) (??:0)
FUI_NetApp::handlePathChange(UI_Event*) (??:0)
UI_Queue::processNextEvent() (??:0)
UI_Queue::drain() (??:0)
UI_Queue::eventLoop() (??:0)
main (??:0)

Sorry, I didn't notice the Houdini version number in the crash log before. As I suspected, the steps you provide do not crash in the latest daily builds of Houdini (I tried 9.1.164). There have been numerous fixes to parameter dialogs since 9.1.124. Please install the latest daily build and your problem will go away.

Mark

Ah, I didn't even realize daily builds were available for apprentice users. I'm downloading the latest now, thanks!

-Mark