Distance 1 Release 2 Release Notes

MCDS Analysis Engine

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  {84} Post stratification by variables in the observation layer for MCDS analyses leads to an error in D4CDSNEngineInterface DataFileMaker.GetFactorInfo. (This is because the covariate fields are not included in the SQL queries in CClsDataFileMaker.GetPostStratByObsQuery.) [1 March 2001, LJT; Fixed 12 May 2003, LJT]
  
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  {110} You get an “Invalid or missing covariate” error message if covariables come from SubSample1 layer, even if SubSample1 is chosen as the sample definition on the estimate tab. [29 March 2001, LJT] [Checked 12 May 03 and can’t reproduce – I guess I fixed it in an earlier build]
  
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  {224} MCDS properties: Removing a covariate that has cluster size ticked doesn’t result in the Cluster Size tab restoring itself so that you can set the regression options. [Rob Williams 25 Mar 03; Fixed LJT 26 Mar 03]
  
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  {229} Variance estimates for MCDS analyses calculated incorrectly – in calculating variance component due to estimating the detection function parameters, incorrect divisor (N-1) used (should be N in this cast). Could cause error message “Internal Error 36: F0NOBS=0”. Makes only a very small difference to variance estimates. [5 May 2003; Fixed LJT 5 May 2003]
  
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  {230} Major problem with data extraction for covariate data, when the data are entered as radial distance and angle. In this case, the wrong covariate values can be assigned to the observations. When cluster size is recorded this happens only on the 1^st transect; when cluster size is not recorded it happens for all transects. Similar problems happen for bootstrap data. [2 May 2003 LJT and Ana Caňadas; Fixed LJT 5 May 2003 – Recommend re-running all MCDS analyses where data recorded as radial distance and angle.]
  
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  {231} When fitting routine fails to converge on first iteration, can get a divide by 0 error in line 278 of routine PDFITCOV. [7 May 2003 Ana Caňadas; Fixed LJT 8 May 2003]
  
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  {232} Reported iteration numbers start at 0, when in the CDS engine they start at 1. [8 May 2003 LJT; Fixed LJT 8 May 2003]
  
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  {233} Can get “Internal Error 50: Mismatched strata” in analyses with strata where you estimate a quantity by sample [8 May 2003 Ana Caňadas; Fixed LJT 8 May 2003]
  
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  {235} Occasionally when bootstrapping, can get divide by zero error in subroutine INFO2 [9 May 2003 LJT; Fixed 9 May 2003 (solution was to ensure array AMUI never underflows to zero when returning from AREAS2)]
  
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  {236} If you accidentally choose a field that contains text to be a non-factor covariate, the engine crashes [8 May 2003 Charles Paxton; Fixed 12 May LJT: the NEngineInterface now checks the field type and issues a warning if it is text – didn’t want to stop the analysis completely as the field may be all numbers even if its of type ‘text’.]