I'm back! I'm trying to run a simple quick delivery of a Batch file and it succeeds on some computers, but I get the error message in the title for others when it tries to run. Here are the logs from a failed Quick Delivery:
<event date='11/06/2015 13:35:56.6660000 -05:00' severity='4' hostName='COMPUTER5' source='DeliverSoftware_Task::Run' module='smfagent.dll' process='AeXNSAgent.exe' pid='8080' thread='6948' tickCount='20046187'>
<![CDATA[Starting the New QD task...]]>
</event>
<event date='11/06/2015 13:35:56.6660000 -05:00' severity='4' hostName='COMPUTER5' source='DeliverSoftware_Task::Run' module='smfagent.dll' process='AeXNSAgent.exe' pid='8080' thread='6948' tickCount='20046187'>
<![CDATA[Waiting for the Quick Delivery lock]]>
</event>
<event date='11/06/2015 13:35:56.6690000 -05:00' severity='4' hostName='COMPUTER5' source='SWDAgent' module='smfagent.dll' process='AeXNSAgent.exe' pid='8080' thread='6948' tickCount='20046187'>
<![CDATA[Add SWD task Execute PowerComp.bat (PowerComp Test) {95CFE38D-5DD7-4E5C-A9EB-A269FC8883B7} to run queue]]>
</event>
<event date='11/06/2015 13:35:56.6750000 -05:00' severity='4' hostName='COMPUTER5' source='ScheduleEngine' module='AgentScheduler.dll' process='AeXNSAgent.exe' pid='8080' thread='10228' tickCount='20046203'>
<![CDATA[Schedule ({8C055B3A-653D-40A0-8666-5C9B604A8872}) has been removed]]>
</event>
<event date='11/06/2015 13:35:56.6770000 -05:00' severity='4' hostName='COMPUTER5' source='ScheduleEngine' module='AgentScheduler.dll' process='AeXNSAgent.exe' pid='8080' thread='10228' tickCount='20046203'>
<![CDATA[Schedule ({8C055B3A-653D-40A0-8666-5C9B604A8872}) has been added, check all schedules in a few moments]]>
</event>
<event date='11/06/2015 13:35:56.7020000 -05:00' severity='4' hostName='COMPUTER5' source='PackageDelivery' module='AeXPackageDelivery.dll' process='AeXNSAgent.exe' pid='8080' thread='7648' tickCount='20046218'>
<![CDATA[Begin download for package: PowerComp Test {78440A6A-D13C-4B57-A411-18B154587FE9}]]>
</event>
<event date='11/06/2015 13:35:56.7030000 -05:00' severity='4' hostName='COMPUTER5' source='SWDAgent' module='smfagent.dll' process='AeXNSAgent.exe' pid='8080' thread='7648' tickCount='20046234'>
<![CDATA[Begin download for package: {78440A6A-D13C-4B57-A411-18B154587FE9}.]]>
</event>
<event date='11/06/2015 13:35:56.7440000 -05:00' severity='4' hostName='COMPUTER5' source='PackageDownload' module='AeXPackageDelivery.dll' process='AeXNSAgent.exe' pid='8080' thread='7648' tickCount='20046265'>
<![CDATA[Download package sources from: https://altiris.domain.com:443/Altiris/NS/Agent/Ge... resource="{A6EB7A5A-BF4C-49D5-8C8B-7F30F51F5481}" version="1" type="codebases" compress="1" totalTime="0" totalFailureTime="0">
<packages>
<package guid="{78440A6A-D13C-4B57-A411-18B154587FE9}"/>
</packages>
<addresses>
<address ip="147.55.1.3"/>
</addresses>
</request>
]]>
</event>
<event date='11/06/2015 13:35:56.8010000 -05:00' severity='4' hostName='COMPUTER5' source='PackageRequest' module='AeXPackageDelivery.dll' process='AeXNSAgent.exe' pid='8080' thread='7648' tickCount='20046328'>
<![CDATA[Security key for package validation is missing from response. Previously stored key will be used (if exist).]]>
</event>
<event date='11/06/2015 13:35:56.8010000 -05:00' severity='2' hostName='COMPUTER5' source='PackageDelivery' module='AeXPackageDelivery.dll' process='AeXNSAgent.exe' pid='8080' thread='7648' tickCount='20046328'>
<![CDATA[Error while downloading package: No package sources returned by server (0x80070490)]]>
</event>
<event date='11/06/2015 13:35:56.8010000 -05:00' severity='4' hostName='COMPUTER5' source='DownloadQueue' module='AeXPackageDelivery.dll' process='AeXNSAgent.exe' pid='8080' thread='7648' tickCount='20046328'>
<![CDATA[Retry package: id={78440A6A-D13C-4B57-A411-18B154587FE9} delay=180 secs at=11/6/2015 1:38:56 PM causedDelay=1 earliestRetryTime=
]]>
</event>
<event date='11/06/2015 13:35:56.8060000 -05:00' severity='4' hostName='COMPUTER5' source='PackageDelivery' module='AeXPackageDelivery.dll' process='AeXNSAgent.exe' pid='8080' thread='7648' tickCount='20046328'>
<![CDATA[End download for package: PowerComp Test {78440A6A-D13C-4B57-A411-18B154587FE9}. Status: retrying]]>
</event>
<event date='11/06/2015 13:35:56.8060000 -05:00' severity='4' hostName='COMPUTER5' source='SWDAgent' module='smfagent.dll' process='AeXNSAgent.exe' pid='8080' thread='7648' tickCount='20046328'>
<![CDATA[End download for package: {78440A6A-D13C-4B57-A411-18B154587FE9}.]]>
</event>