TData with 10.3

[Otto]

Hello James,
would you be so kind to help me.
I updated to version 10.3. Now if I try to open a certain dbf-file I get following error:

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Application
===========
   Path and name: C:\xwinhotel\xwinhotel.EXE (32 bits)
   Size: 3,633,152 bytes
   Time from start: 0 hours 0 mins 4 secs
   Error occurred at: 08.04.2010, 20:08:03
   Error description: Error BASE/1111  Argument error: LEN
   Args:
     [   1] = U  

Stack Calls
===========
   Called from:  => LEN(0)
   Called from: .\source\classes\DATABASE.PRG => (b)TDATABASE:TDATABASE(99)
   Called from:  => TDATA:FCOUNT(0)
   Called from: .\source\classes\DATABASE.PRG => TDATA:LOAD(657)
   Called from: ..\SOURCE\TDATA.PRG => TDATA:USE(555)
   Called from: C:\develop8\WH_Fwh\XWINHO~1\WINHOTEL.PRG => MAIN(0)

System
======
 

If I link in FIVEWIN database.prg from a previous version all is working.
Thanks in advance
Otto

[nageswaragunupudi]

If you use TDatabase class as in FWH database.prg there should be no problem. Version 10.3 TDatabase class works well. You may check browing of database object in the sample testxbr3.prg.

I understand, TData class is derived from TDatabase class of FWH. TDatabase class has a DATA aStruct. From version 10.2 onwards this is the change in the method FCount() in tdatabase class of FWH

Upto version 10.1

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  METHOD FCount()            INLINE ( ::nArea )->( FCount() )

From version 10.2

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  METHOD FCount()            INLINE Len( ::aStruct )
 

This change was necessary due to several other improvements in tdatabase.prg. From the above error, I understand that the TData class is not maintaining the DATA aStruct and therefore Len(::aStruct) fails.

One solution is to override method FCount() in the derived class in your application ( or Tdata class ).

In your derived class:

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  METHOD FCount()            INLINE ( ::nArea )->( FCount() )

[norberto]

i have the same problem... can someone contact james bott to try any solution? thanks

[nageswaragunupudi]

Similar to FCount(), FieldPos() also is changed.

[TimStone]

I discussed this with James last month. Here is the solution:

Remove the line and add the line shown below in the Use() method of TData. Just put the new line right were the old line was.

//::load() // Remove this line
::setArea( ::nArea ) // New for TDatabase 10.02

[James Bott]

Otto and Norberto,

See your private email for an updated copy of TData.

Regards,
James

[norberto]

hi james, very thanks... my email is norberto@windowslive.com

[mmercado]

Dear James:

See your private email for an updated copy of TData.

I'll be checking my email every minute from now

Best regards.