How to Launch Applications (Erica's launch crashes)

[sapsi]

Hello,
I have two questions but will focus on the second in another post.
I just installed Cydia (via redsn0w on an iphone 3g) and an immensely impressed with all the work people have done. Kudos.

Objective: To run a program around 7am everyday to listen to streaming music

Q1: How can i launch a program from the commandline? I tried launch from Ericautilies and it crashes (see below)


Q2: (Another post , but just asking) How do I install crontab on the iphone? I would setup a crontab entry for 7 am to play some music.

Any help would be greatly appreciated.
Regards
Sha




==ERICA CRASH==

mobile$ launch com.appple.Calculator
2009-09-09 20:50:02.935 launch[99:903] *** Assertion failure in -[UIApplication init], /SourceCache/UIKit/UIKit-963.10/UIApplication.m:398
2009-09-09 20:50:02.955 launch[99:903] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'There can only be one UIApplication instance.'
2009-09-09 20:50:02.970 launch[99:903] Stack: (
808001701,
805397928,
807551015,
811055191,
814675896
)

iPhone:~ mobile$ openURL ericasadun.com
2009-09-09 20:50:16.770 openURL[101:903] *** Assertion failure in -[UIApplication init], /SourceCache/UIKit/UIKit-963.10/UIApplication.m:398
2009-09-09 20:50:16.789 openURL[101:903] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'There can only be one UIApplication instance.'
2009-09-09 20:50:16.804 openURL[101:903] Stack: (
808001701,
805397928,
807551015,
811055191,
814675896
)

[iquanyin]

if you don't learn here, hacintosh or xsellize forums (or irc) are worth trying.

[metadox]

I know this is an old forum but I wanted to give it a try anyways. I'm very new to iphone development and need this cleared up a little.

I noticed in all my readings of erica utilities (ericasadun.com) they are using an older firmware version.

However I currently have it installed on my 3GS IOS 4.1 phone and my objective is to use the launch command via terminal to launch an App. Can this be done?

When I run the command "launch Docs.app" I get an error.

..[$] <()> launch Docs.app
2010-12-13 15:01:47.503 launch[203:107] *** Assertion failure in -[UIApplication init], /SourceCache/UIKit/UIKit-1262.60.3/UIApplication.m:510
2010-12-13 15:01:47.521 launch[203:107] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'There can only be one UIApplication instance.'
*** Call stack at first throw:
(
	0   CoreFoundation                      0x344aaed3 __exceptionPreprocess + 114
	1   libobjc.A.dylib                     0x33975811 objc_exception_throw + 24
	2   CoreFoundation                      0x344aad15 +[NSException raise:format:arguments:] + 68
	3   Foundation                          0x3329b32f -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 62
	4   UIKit                               0x31ace9a9 -[UIApplication init] + 128
	5   launch                              0x00001d90 main + 252
	6   launch                              0x00001bec _start + 312
	7   launch                              0x00001a88 start + 24
)
terminate called after throwing an instance of 'NSException'
[1]    203 abort      launch Docs.app

Is this becuase I'm missing UIKit Tools or Mobile Substrate?

I don't understand why these two libs are missing from the repos. However I found the deb file from Index of /cydia/debs/ is it safe to download and install via terminal?

Or I shouldn't install them becuase they are in my current firmware version?

Any help would be gratefully appreciated.