DM finst system doesn't work

[rlwest]

the test is to cause a halt using the DM finst settings

from python_actr import *

class MyEnvironment(Model):
pass

class MyAgent(ACTR):

focus=Buffer()
DMbuffer=Buffer()

DM=Memory(DMbuffer,latency=0.05,threshold=-25,maximum_time=25,finst_size=4,finst_time=4000)

dm_bl=DMBaseLevel(DM,decay=0.5,limit=None)
 
focus.set('goal:recall')

DM.add('animal:tiger')

def request(focus='goal:recall'):
    print("requesting")
    DM.request('animal:?x')            
    focus.set('goal:retrieve')     

def retrieve(DMbuffer='animal:?animal'): 
    print("+++++++++++++++++++++++++++++++++++++++++++")                       
    print (animal)
    DMbuffer.set('nil')
    focus.set('goal:recall')

tim=MyAgent()
somewhere=MyEnvironment()
somewhere.agent=tim
log_everything(somewhere)
somewhere.run()

[rlwest]

OK, figured it out
You need to add <require_new=True> to the request
DM.request('animal:?x',require_new=True)

from python_actr import *

class MyEnvironment(Model):
pass

class MyAgent(ACTR):

focus=Buffer()
DMbuffer=Buffer()

DM=Memory(DMbuffer,latency=0.05,threshold=-25,maximum_time=25,finst_size=4,finst_time=4)

dm_bl=DMBaseLevel(DM,decay=0.5,limit=None)
 
focus.set('goal:recall')

DM.add('animal:tiger')
DM.add('animal:zebra')
DM.add('animal:otter')
DM.add('animal:shark')


def request(focus='goal:recall'):
    print("requesting")
    DM.request('animal:?x',require_new=True)            
    focus.set('goal:retrieve')     

def retrieve(DMbuffer='animal:?animal'): 
    print("+++++++++++++++++++++++++++++++++++++++++++")                       
    print (animal)
    DMbuffer.set('nil')
    focus.set('goal:recall')

tim=MyAgent()
somewhere=MyEnvironment()
somewhere.agent=tim
log_everything(somewhere)
somewhere.run()