Once upon a time (PdoxDOS) I had similar issue. Here is the original PAL 
code (stripped down a little) even with EDIT (ouch). This is from some 
of the oldest PAL I ever wrote. Still working fine. Used regularly on 
(unkeyed) table of 200K+ records. Seemed fast enough. Maybe I didn't 
understand crosstabs back then.

         Query

          SrcTable | Date      | Ref       | Amt       |
                   | CheckPlus | CheckPlus | CheckPlus |

         Endquery
         [SrcTable->Date] = period
         Do_It!
         RENAME "Answer" "Tmp"
         CLEARALL

         EDIT "Tmp"
         Home
         MOVETO [Date]
         SCAN
             IF NOT ISBLANK([Date]) THEN
                 [] = [] - DAY([]) + 1
                 [Amt] =   ROUND([Amt], 2)
             ENDIF
         ENDSCAN
         Do_It!
         CLEARALL

         Query

          Tmp | Date  | Amt             | Src   |
              | Check | calc sum as amt | Check |

         Endquery
         Do_It!
         CLEARALL

- Bernie

On 22/5/20 7:28 pm, Kevin Baker wrote:
> First, the code works for combining the data from CT2.db into CT1.db, 
> but now I'm getting strange things happening when creating the CT2.db.
> 
> The user selects the year they want (i.e. 2019) and I use the below code 
> to generate CT2.DB (I also tried another method I'll discuss later in 
> this post).
> 
> ;build month begin/end vars
> s1 = "1/1/"+yv
> e1 = "1/31/"+yv
> 
> s2 = "2/1/"+yv
> if s2.isLeapYear() then
>      e2 = "2/29/"+yv
> else
>      e2 = "2/28/"+yv
> endif
> 
> s3 = "3/1/"+yv
> e3 = "3/31/"+yv
> 
> s4 = "4/1/"+yv
> e4 = "4/30/"+yv
> 
> s5 = "5/1/"+yv
> e5 = "5/31/"+yv
> 
> s6 = "6/1/"+yv
> e6 = "6/30/"+yv
> 
> s7 = "7/1/"+yv
> e7 = "7/31/"+yv
> 
> s8 = "8/1/"+yv
> e8 = "8/31/"+yv
> 
> s9 = "9/1/"+yv
> e9 = "9/30/"+yv
> 
> s10 = "10/1/"+yv
> e10 = "10/31/"+yv
> 
> s11 = "11/1/"+yv
> e11 = "11/30/"+yv
> 
> s12 = "12/1/"+yv
> e12 = "12/31/"+yv
> 
> qvar = query
> ANSWER: :PRIV:CT2.DB
> 
> Giving.DB | MainId          | Date          | Amount              
| 
> Category        |
>               | Check not blank | >=~s1,<=~e1   | calc sum as Total,

> calc "Jan" as "Month" | check not split |
>               | Check not blank | >=~s2,<=~e2   | calc sum as Total,

> calc "Feb" as "Month" | check not split |
>               | Check not blank | >=~s3,<=~e3   | calc sum as Total,

> calc "Mar" as "Month" | check not split |
>               | Check not blank | >=~s4,<=~e4   | calc sum as Total,

> calc "Apr" as "Month" | check not split |
>               | Check not blank | >=~s5,<=~e5   | calc sum as Total,

> calc "May" as "Month" | check not split |
>               | Check not blank | >=~s6,<=~e6   | calc sum as Total,

> calc "Jun" as "Month" | check not split |
>               | Check not blank | >=~s7,<=~e7   | calc sum as Total,

> calc "Jul" as "Month" | check not split |
>               | Check not blank | >=~s8,<=~e8   | calc sum as Total,

> calc "Aug" as "Month" | check not split |
>               | Check not blank | >=~s9,<=~e9   | calc sum as Total,

> calc "Sep" as "Month" | check not split |
>               | Check not blank | >=~s10,<=~e10 | calc sum as Total,

> calc "Oct" as "Month" | check not split |
>               | Check not blank | >=~s11,<=~e11 | calc sum as Total,

> calc "Nov" as "Month" | check not split |
>               | Check not blank | >=~s12,<=~e12 | calc sum as Total,

> calc "Dec" as "Month" | check not split |
> endQuery
> 
> if not executeQBE(qvar) then
>      errorShow()
> endif
> 
> 
> When this runs, I get errors like 1.jpg and 2.jpg.  So I switch to 
> creating CT2.db by creating a new CT3.db file as shown below:
> 
> qvar = query
> ANSWER: :PRIV:CT3.DB
> 
> Giving.DB | MainId          | Date  | Amount  | Category   | 
> PmtMeth               |
>               |    Check Not Blank | Check | Check   | Check Not Split,

> Not Blank | calc blank as "Month" |
> endQuery
> 
> if not executeQBE(qvar) then
>      errorShow()
> endif
> 
> ;Compute Month
> tc1.open(":PRIV:CT3.DB")
> tc1.edit()
> 
> scan tc1:
>      tc1."Month" = moy(tc1."Date")
>      tc1.unlockRecord()
> endScan
> 
> tc1.endEdit()
> tc1.close()
> 
> 
> When I run the tcursor, it updates the first record, then I get a GPV.
> 
> I'm not sure if I'm doing something wrong or if this is come kind of bug 
> in Paradox.
> 
> I'm doing this as a DIY crosstab query.
> 
> To help in reading the queries I've attached them as text files.
> 
> Thanks
> Kevin
> 
>