I use the following code to drive the XFRX Previewer. After the preview shows, I use the toolbar to select output to EXCEL. The report takes twenty three minutes to process:

loSession = xfrx("XFRX#INIT")
lnRetVal = loSession.SetParams(,,,,,,"XFF") && no name = just in memory
If lnRetVal = 0
   *
   * initialize the previewer 
   *
   loPreview = CREATEOBJECT("frmPreviewer")
   loPreview.windowtype = 1 && modal
   *
   * the finalize method returns the XFRX#DRAW object reference
   *
   loSession.ProcessReport(m.lcRepName, m.lcCondition)
   loPreview.cmdopen.Click(loSession.finalize()) && show the document
   loPreview.show(1)
   *
ENDIF

However when I use the following code which bypasses the XFRX previewer, the same report processes within four minutes.

loSession=xfrx("XFRX#INIT")
lnRetVal = loSession.SetParams(ForceExt(m.lcRepName,[xls]),,,,,,"XLS")
If lnRetVal = 0

   loSession.SetOtherParams("NEXT_SHEET_NAME", m.Title1)
   loSession.ProcessReport(m.lcRepName, m.lcCondition)
   loSession.finalize()

Endif

Any advice would be greatly appreciated.