NPE when issuing \more INEXISTENT_FILE in batch mode (probably caused by changes made for #7406 as this NPE didn't occur in rc-14).

e.g: run a script containing the following text in batch mode:

more inexistent_file.txt

or

more ""

it throws the following exception (stacktrace from rc-22 build):

java.lang.reflect.InvocationTargetException
    at java.awt.EventQueue.invokeAndWait(EventQueue.java:1075)
    at \\...\\ .\\हिñçêČάй語简�?한\\.Rꊕꈋꁃ while.k(Unknown Source)
    at \\...\\ .\\हिñçêČάй語简�?한\\.mᛯꏼꏳꀏ assert catch.FK(Unknown Source)
    at \\...\\ .\\हिñçêČάй語简�?한\\.mᛯꏼꏳꀏ assert catch.h(Unknown Source)
    at \\...\\ .\\हिñçêČάй語简�?한\\.mᛯꏼꏳꀏ assert catch.fM(Unknown Source)
    at \\...\\ .\\हिñçêČάй語简�?한\\.mᛯꏼꏳꀏ assert catch.fL(Unknown Source)
    at \\...\\ .\\हिñçêČάй語简�?한\\.mᛯꏼꏳꀏ assert catch.a(Unknown Source)
    at \\...\\ .\\हिñçêČάй語简�?한\\.mᛯꏼꏳꀏ assert catch.a(Unknown Source)
    at com.aquafold.datastudio.tools.shell.Rꑣꎆ⠱.execute(Unknown Source)
    at \\...\\ .\\हिñçêČάй語简�?한\\.jꇜᛰꅌꉦ transient 4.run(Unknown Source)
    at com.aquafold.datastudio.tools.shell.q̯⢽ꅸꏠ long.cF(Unknown Source)
    at com.aquafold.datastudio.tools.shell.iꋗ̆ꐝꀥ if final.execute(Unknown Source)
    at com.aquafold.datastudio.tools.shell.S̄ꏛꍃ⢿.a(Unknown Source)
    at \\...\\ .\\हिñçêČάй語简�?한\\.w̔ꒄᢉ᠜ 9 enum.a(Unknown Source)
    at \\...\\ .\\हिñçêČάй語简�?한\\.bᢠꂴ⢴⠈.a(Unknown Source)
    at \\...\\ .\\हिñçêČάй語简�?한\\.bꐸꆉ⡅ꇶ while volatile.a(Unknown Source)
    at com.aquafold.datastudio.tools.shell.tꉛꈈᝂᜩ switch long.cF(Unknown Source)
    at com.aquafold.datastudio.tools.shell.iꋗ̆ꐝꀥ if final.execute(Unknown Source)
    at com.aquafold.datastudio.tools.shell.Sꐛꇀꄘ᠟ static.a(Unknown Source)
    at com.aquafold.datastudio.tools.shell.Sꐛꇀꄘ᠟ static.a(Unknown Source)
    at \\...\\ .\\हिñçêČάй語简�?한\\.nꅻꃒꆃ⡇ enum.aUP(Unknown Source)
    at \\...\\ .\\हिñçêČάй語简�?한\\.nꅻꃒꆃ⡇ enum.execute(Unknown Source)
    at com.aquafold.datastudio.RunFluidShell.main(Unknown Source)
Caused by: java.lang.NullPointerException
    at \\...\\ .\\हिñçêČάй語简�?한\\.Rꎕ⢙ꎕꏧ this instanceof.run(Unknown Source)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:666)
    at java.awt.EventQueue.access$400(EventQueue.java:81)
    at java.awt.EventQueue$2.run(EventQueue.java:627)
    at java.awt.EventQueue$2.run(EventQueue.java:625)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:636)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

In ADStudio 12 RC 14, \more command in this case was printing a message such as:

inexistent_file.txt: No such file or directory