>>I have a method that changes the .Database property of Cursor objects in the Dataenvironment to point to the correct data folder, rather than my development folder. I have .AutoOpenTables = .F. for these dataenvironments, and do DataEnvironment.OpenTables() after setting the property. I have one form where the OpenTables() was giving me the "Object is not contained in a form" error, which I asked about in another thread. Searching help for insight, I found this:
>>
>>"Note that setting a cursor object property at run time generates an error (with the exception of the Filter and Order properties, which can be set at run time). For a new property setting to take effect, you must call the CloseTables and OpenTables methods for the data environment."
>>
>>I thought that I was solving this common problem in the right way. What is the right way to ensure that a DataEnvironment opens data from the correct folder and not from some copy? This code has always worked, except for this one form, and the error doesn't obviously point to this rule.
>
>You are trying to solve it the right way, but someting has gone wrong. Howsabout posting your code that changes the database?

Each form's DataEnvironment has .AutoOpenTables = .F. and .AutoCloseTables = .T.. In the .Load of two of my form classes:

SET TALK OFF
oChangeDataPath = CREATEOBJECT('datafolder')
oForm = THISFORM
oChangeDataPath.curfolder(oForm)
RELEASE oChangeDataPath
RELEASE oForm

My datafolder classes has this code in its .curfolder method:

PARA oFormcalled
* This class resets the paths of tables in the data environment
* to CURDIR()
IF PARAMETERS() = 0
   RETURN
ENDIF
IF TYPE("oFormcalled.DataEnvironment") = "O"
   oEnviron = oFormcalled.DataEnvironment
ELSE
   RETURN
ENDIF
IF TYPE("oEnviron") = "O"
   nTotMem = AMEMBERS(aMems,oEnviron,2)
   WITH oEnviron
      IF .AutoOpenTables = .F.
* Check for cursors
         FOR i = 1 TO m.nTotMem
            IF UPPER(EVAL("."+aMems[m.i]+".BaseClass")) = "CURSOR"
               WITH EVAL("."+aMems[m.i])
                  STORE .Database TO cDB
                  cDB = SUBSTR(cDB,RAT('\',cDB)+1)
* The help implies that the .Database property shouldn't be
* changed like this in runtime:
.Database = SUBSTR(FULLPATH(cDB),1,RAT('\',FULLPATH(cDB)))+cDB
               ENDWITH
            ENDIF
         ENDFOR
* This line generates the error "Object is not contained in a form":
         .OpenTables()
      ENDIF
   ENDWITH
ENDIF
RELEASE oEnviron

The error happens when I start the form from another form which has one of the same tables in its dataenvironment. However, I have two other similar pairs of forms that work that way without error. If I go straight to the form from the main form, there is no error. In each case, the first form is based on one form class, and the second form is based on the other form class.

I can see no essential difference between the affected pair of forms and the other two pairs. I tried creating the form again from scratch in case the form was corrupted somehow, but it made no difference.

The form that generates the error used to have a private datasession. At that time, the error would occur in the other form that opened it, after entering, exiting, and entering and exiting some other pair of forms.

Thanks for all the help.