Already did that.
Strange thing is, I don't get the error using the supplied default 737 config, but copying the triple config from the default 747 package and putting it on my DC-10 is producing the error.
Like I said, before, never had the error, just all of a sudden showed up.
And, I have deleted and reinstalled with reboots at least 3 times now with no luck.

Here's the panel.cfg, which I'm not catching any errors:
Code:// This Panel.cfg file created by FS Panel Studio panel editor utility - http://www.fspanelstudio.com
// Built Saturday, July 22, 2006 at 18:19 FSPS Build:18222
[Window Titles]
Window00=DC10 Main
Window01=Fuel
Window02=GPS PIC
Window03=Radio
Window04=INS Control Display Units
Window05=INS Mode Select Units
Window06=Gauges
[VIEWS]
VIEW_FORWARD_WINDOWS=MAIN_PANEL,COLLECTIVE_PANEL,GPS_PANEL,RADIO_STACK_PANEL,41,40,THROTTLE_PANEL
VIEW_FORWARD_ZOOM=1.000
VIEW_FORWARD_EYE=0.000, 0.000, 0.000
VIEW_FORWARD_DIR=1.400, 0.000, 0.000
VIEW_FORWARD_RIGHT_WINDOWS=31
VIEW_FORWARD_RIGHT_ZOOM=0.900
VIEW_FORWARD_RIGHT_EYE=0.000, 0.000, 0.000
VIEW_FORWARD_RIGHT_DIR=1.000, 0.000, 40.000
VIEW_RIGHT_WINDOWS=32
VIEW_RIGHT_ZOOM=0.900
VIEW_RIGHT_EYE=0.000, 0.000, 0.000
VIEW_RIGHT_DIR=1.000, 0.000, 90.000
VIEW_REAR_RIGHT_WINDOWS=33
VIEW_REAR_RIGHT_ZOOM=0.900
VIEW_REAR_RIGHT_EYE=3.300, 0.000, -20.000
VIEW_REAR_RIGHT_DIR=12.000, 0.000, 110.000
VIEW_REAR_WINDOWS=34
VIEW_REAR_ZOOM=0.900
VIEW_REAR_EYE=1.400, 0.000, 0.000
VIEW_REAR_DIR=11.850, 0.000, 0.000
VIEW_REAR_LEFT_WINDOWS=35
VIEW_REAR_LEFT_ZOOM=0.900
VIEW_REAR_LEFT_EYE=2.000, 0.000, -35.000
VIEW_REAR_LEFT_DIR=10.000, 0.000, 275.000
VIEW_LEFT_WINDOWS=36
VIEW_LEFT_ZOOM=0.900
VIEW_LEFT_EYE=0.000, 0.000, 0.000
VIEW_LEFT_DIR=1.000, 0.000, 270.000
VIEW_FORWARD_LEFT_WINDOWS=37
VIEW_FORWARD_LEFT_ZOOM=0.900
VIEW_FORWARD_LEFT_EYE=0.000, 0.000, 0.000
VIEW_FORWARD_LEFT_DIR=1.000, 0.000, 320.000
VIEW_UP_WINDOWS=30
VIEW_UP_DIR=340.000, 0.000, 0.000
//--------------------------------------------------------
[Window00]
file=DC10PIC.bmp
size_mm=1024
window_size_ratio=1.000
position=8
visible=1
ident=MAIN_PANEL
window_size= 1.000, 1.000
window_pos= 0.000, 0.000
gauge00=DC10.PANDIM_PIC, 0,0,1024,768
gauge01=CNCRD!Attitude-indicator, 164,420,150,152
gauge02=CNCRD!Horizontal-situation-indicator, 164,572,150,152
gauge03=DC10sa.Trim2k, 894,629,20,11
gauge04=DC10sa.AC, 664,20,16,26
gauge05=DC10sa.Temp, 902,442,65,25
gauge06=Dc10sa.HGHB_toga, 896,464,20,19
gauge07=DC10sa.At.annun, 79,388,46,71
gauge08=Dc10sa.Gear, 951,500,40,141
gauge09=Dc10sa.Sign_2k, 742,5,75,50
gauge10=Dc10sa.HGHB_Gearan, 958,447,68,44
gauge11=1011.clock, -42,467,86,84
gauge12=Dc10sa.Thrust, 722,704,125,90
gauge13=Dc10sa.Airbrake, 663,703,40,163
gauge14=Dc10sa.Flapslever, 860, 703 ,25,122
gauge15=CNCRD!DME, 61,556,88,45
gauge16=737-400!Deice Switch, 689,20,16,26
gauge17=737-400!Pitot Heat, 710,20,16,26
gauge18=737-400!Landing Lights, 831,20,16,26
gauge19=737-400!Strobe Lights, 868,20,16,26
gauge20=737-400!Beacon Lights, 848,20,16,26
gauge21=737-400!Navigation Lights, 886,20,16,26
gauge22=737-400!Pitch Trim, 877,286,25,56
gauge23=CNCRD!Radio-Naviagtion-1, 557,287,68,63
gauge24=CNCRD!AP-Vor-Window, 630,300,32,17
gauge25=CNCRD!Backcourse-Hold-Button, 517,351,30,20
gauge26=CNCRD!Flight-Director-Switch, 519,298,25,40
gauge27=CNCRD!Autothrottle-Switch, 705,284,22,34
gauge28=CNCRD!Mach-Hold-Button, 676,356,30,20
gauge29=CNCRD!Airspeed-Hold-Button, 722,356,30,20
gauge30=CNCRD!AP-Airspeed-Window, 721,323,32,16
gauge31=CNCRD!AP-Mach-Window, 676,323,32,16
gauge32=CNCRD!Nav-Hold-Button, 764,352,30,20
gauge33=CNCRD!Approach-Hold-Button, 796,352,30,20
gauge34=CNCRD!Hdg-Hold-Button, 827,352,30,20
gauge35=CNCRD!AP-Hdg-Window, 793,291,32,16
gauge36=CNCRD!AP-Vertical-Speed-Window, 910,323,52,16
gauge37=CNCRD!AP-Altitude-Window, 910,292,52,17
gauge38=CNCRD!Yaw-Dump-Button, 890,352,30,20
gauge39=CNCRD!Wing-Leveler-Button, 922,352,30,20
gauge40=CNCRD!Attitude-Hold-Button, 1016,301,30,20
gauge41=CNCRD!Altitude-Hold-Button, 954,352,30,20
gauge42=CNCRD!Autopilot-Switch, 973,297,25,40
gauge43=Dc10sa.stbatt_2k, 547,444,75,70
gauge44=DC10sa.Surf, 883,632,48,54
gauge45=CNCRD!Engine-Manage-Lights, 646,410,70,13,1
gauge46=CNCRD!Engine-Manage-Lights, 715,410,70,13,2
gauge47=CNCRD!Engine-Manage-Lights, 784,410,70,13,3
gauge48=737-400!GPS Display Toggle, 587,355,15,14
gauge49=CNCRD!Fuel-Panel-Display-Toggle, 602,355,15,14
gauge50=737-400!Avionics Display Toggle, 572,355,15,14
gauge51=cessna208!ATC-Display-Toggle, 557,355,15,14
gauge52=tab-spoiler, 437,434,42,14
gauge53=FPDA_Gear_Wind, 1,1,10,9
gauge54=CNCRD!Taxi-Lights-Switch, 813,20,16,26
gauge55=CNCRD!VOR, 58,607,93,96
gauge56=CNCRD!ADF, 406,543,95,94
gauge57=737-400!Flaps Ext, 933,534,18,17
gauge58=737-400!Flaps Transit, 933,554,18,17
gauge59=CNCRD!Radio-Altimeter, 415,458,79,78
gauge60=dc10sa.dimsw_PIC, 480,312,10,9
gauge61=fpda_boeing_callout, 1,1,10,9
gauge62=Dc10sa.Airsp2k, 49,443,110,109
gauge63=Dc10sa.Alt2k, 315,452,95,96
gauge64=Dc10sa.VSI, 325,556,74,73
gauge65=Dc10sa.S.airspeed, 544,620,80,79
gauge66=magnetic_compass!Magnetic-Compass, 751,54,65,64
gauge67=Dc10sa.S.alt2k, 541,527,88,89
gauge68=Dc10sa.OMI, 510,474,19,51
gauge69=Dc10sa.Flaps, 887,525,27,79
gauge70=Rel_Wind_v3.0!RelWind, 323,642,69,69
gauge71=../civa/INS!Config, 0, 0, 0, 0, dc1030
gauge72=../civa/INS!NavModeTriple, 555, 402, 56
gauge73=../civa/INS!UpdateFlags, 422, 389, 70, 38
gauge74=../civa/INS!MsuPanelIcon, 497, 392, 14, 14, 40
gauge75=../civa/INS!CduPanelIcon, 497, 409, 14, 14, 41
gauge76=Z_L1011KM!N1_RIBBON_GAUGE, 662,453,41,143
gauge77=Z_L1011KM!TGT_RIBBON_GAUGE, 703,453,38,143
gauge78=Z_L1011KM!N3_RIBBON_GAUGE, 742,453,45,143
gauge79=Z_L1011KM!FF_RIBBON_GAUGE, 787,453,40,143
gauge80=Z_L1011KM!ASI_BUG_SELECT, 55,448,15,15
gauge81=SimIcons!ECU Icon, 618,355,15,14
//--------------------------------------------------------
[Window01]
file=dc10_fuel.bmp
size_mm=1024
window_size_ratio=1.000
position=8
visible=0
ident=COLLECTIVE_PANEL
window_size= 1.000, 1.000
window_pos= 0.000, 0.000
gauge00=CNCRD!Fuel-Quantity, 696,430,64,63,Front
gauge01=CNCRD!Fuel-Quantity, 644,486,64,63,Left
gauge02=CNCRD!Fuel-Quantity, 750,487,64,63,Right
gauge03=CNCRD!Fuel-Quantity, 698,541,64,63,Back
gauge04=CNCRD!Front-Low-Fuel, 667,429,28,19
gauge05=CNCRD!Left-Low-Fuel, 661,553,28,19
gauge06=CNCRD!Right-Low-Fuel, 770,553,28,19
gauge07=CNCRD!Back-Low-Fuel, 667,588,28,19
gauge08=CNCRD!Fuel-Crossfeed, 710,496,37,41
gauge09=CNCRD!Fuel-Pump, 803,550,51,49
gauge10=CNCRD!Battery-Switch, 650,653,28,30
gauge11=CNCRD!Engine1-Ignition-Switch, 749,632,22,30
gauge12=CNCRD!Engine2-Ignition-Switch, 780,632,22,30
gauge13=CNCRD!Engine3-Ignition-Switch, 809,632,22,30
gauge14=CNCRD!Generator1-Switch, 749, 672 ,22,30
gauge15=CNCRD!Generator2-Switch, 780,671,22,30
gauge16=CNCRD!Generator3-Switch, 808,671,22,30
gauge17=DC10jv.tanksw, 769,421,66
gauge18=../Civa/INS!BatParallel, 817,496,34
//--------------------------------------------------------
[Window02]
file=gps_A.bmp
size_mm=1024
window_size_ratio=1.000
position=8
visible=0
ident=GPS_PANEL
window_size= 1.000, 1.000
window_pos= 0.000, 0.000
gauge00=fs9gps!gps_500, 539,381,488,326
//--------------------------------------------------------
[Window03]
file=radio_a.bmp
size_mm=1024
position=0
visible=0
ident=RADIO_STACK_PANEL
gauge00=737-400!Comm 1, 650,432,204,50
gauge01=737-400!Nav 1, 650,481,204,50
gauge02=737-400!Nav 2, 650,530,204,50
gauge03=737-400!Transponder, 650,579,204,50
gauge04=737-400!ADF, 650,628,204,50
gauge05=737-400!Audio, 650,677,204,23
//--------------------------------------------------------
[Window04]
Background_color=16,16,16
size_mm=600,158
position=8
visible=0
ident=41
gauge00=../civa/ins!Cdu1, 0, 0, 200, 158
gauge01=../civa/ins!Cdu2, 200, 0, 200, 158
gauge02=../civa/ins!Cdu3, 400, 0, 200, 158
//--------------------------------------------------------
[Window05]
Background_color=16,16,16
size_mm=600,57
position=1
visible=0
ident=40
gauge00=../civa/INS!Msu1, 0, 0, 200, 57
gauge01=../civa/INS!Msu2, 200, 0, 200, 57
gauge02=../civa/INS!Msu3, 400, 0, 200, 57
//--------------------------------------------------------
[Window06]
file=gauges.bmp
size_mm=1024
window_size_ratio=1.000
position=8
visible=0
ident=THROTTLE_PANEL
window_size= 1.000, 1.000
window_pos= 0.000, 0.000
gauge00=Z_L1011KM!FF_RIBBON_GAUGE, 820,416,75,248
gauge01=Z_L1011KM!N1_RIBBON_GAUGE, 597,416,71,248
gauge02=Z_L1011KM!N3_RIBBON_GAUGE, 740,417,79,247
gauge03=Z_L1011KM!TGT_RIBBON_GAUGE, 667,417,74,247
[Color]
Day=220,240,245
Night=65,60,55
Luminous=230,210,200
[Default View]
X=0
Y=0
SIZE_X=8191
SIZE_Y=2665
Update:
Tried default 747, works fine. Tried default 737, works fine. For some reason, the above panel, which is on the SGA DC-10-30, is NOT working and is producing the mentioned error.