Misleading error msg from Dis2002 caused by corrupted support files
CT.DAT and MICRO.DAT. The corruption may be in one or both and may be
completely invisible in normal Notepad editor.

7 - HD C               "0200,1.00,277,000,999                       .

  
The line above ended with 0D 0A 0A - two linefeed codes instead of one.

 12.75 
 
The line above had 20 0A 0D added to it, creating an extra blank line.

The mm.db1 database was also corrupted in a very subtle way:
mm0520060404092948,01,255,56091,00264,02,255,56346,00264,05,255,55944,00264,04,255,55964,00264,05,255,55944,00264,06,255,55985,00264,07,255,55981,00264,08,255,55968,00264,09,255,55960,00264,10,255,55960,00264,11,255,55707,00264,12,255,55708,00264,13,255,55581,00264,14,255,55581,00264,15,255,55581,00264,16,255,55581,00264 


The line above had an extra character at the end that caused a problem. It went away when deleted. 
It was a hex 20 according to UE! The 255's are indicative of a sensor problem (unrelated).

090,06,255,62044,01090,07,255,61785,01090,08,255,61772,01090,09,255,61764,01090,10,255,17456,01028,11,255,1720

The line above had an (undetermined) problem that cause a run-on load in the date selection windows.
It consists of digits and commas only! (according to UE)

Error message from Dis2002 2nd observation window:
"Command1_Click1() Problem with file mm.db1 or directory structure"

Last step in Dis2002 debug window:
Calc7.0 1

Code involved
'apply scaling
lowv = 0.05
For o = 1 To I16
i = o + p4offset
 List3.AddItem ("Calc7.0 " + Str(i))
 'T-kvarh U-kvah V-pf W-amps X-kw Y-kwh Z-cost
 W(i) = A(i) / SCAL * BK(i) / 20
 X(i) = W(i) * PF(i) * LV(i) / 1000
 Y(i) = (D(i) / SCA2 * BK(i) / 20 * PF(i) * LV(i) / 120) 'Scale to kwh
 U(i) = (H(i) / SCA2 * BK(i) / 20 * PF(i) * LV(i) / 120) 'Scale to kwh
 'scale KD tp,KH ap to CT parameters as 2
 List3.AddItem ("Calc7.1 " + Str(i))
 KH2(i) = (KH(i) / SCA2 * BK(i) / 20 * PF(i) * LV(i) / 120) 'Scale to kwh

 Z(i) = PRICE * Y(i) / 100
 V(i) = D(i) / (H(i) + lowv)
 diff = (U(i) * U(i) - Y(i) * Y(i))