Version 6

Version 6.13

05/31/10

•	Diagnoses "New File" and "Save File" failure (typically file permission errors).

•	Corrects treatment of dyadic vector product.

•	Removes diagnostic report of empty equation in INACTIVE regions.

•	Plot "ON REGION <number>" searches user's region numbers and defaults to sequential position if match is not found.

•	Preserves node links for PERIODIC and CONTACT boundaries in TRANSFER MESH.

•	Diagnose illegal power arguments in expressions (rather than deliver a runtime error).

•	Expands tabs when printing scripts.

•	Warn if TABULATE coordinates are decreasing.

•	Convert MATRIX times scalar to scalar times MATRIX instead of rejecting expression.

•	Corrects residual errors in treating Curl(scalar) in 2D.

•	Corrects errors in TABLE output on ZOOM areas.

•	Corrects tabulation of neighboring REGIONs for LIMITED FEATUREs on SURFACEs in 3D.

•	Remove unsupported EMF format option from export dialog on Linux and Mac.

•	Added PENWIDTH control to PLOT and SELECT sections.

•	Corrects errors in "ON GRID" plots in time dependent problems.

•	Implements TIMEMAX, TIMEMIN, TIMEMAX_T and TIMEMIN_T to find min and max values over time.

•	Diagnoses common sub-expression table overflow (encountered only in extremely large, highly redundant arithmetic expressions).

Version 6.12

02/07/10

•	Restore interpretation of 2D Curl(scalar) to be consistent with earlier versions (lost in 6.10).

•	Eliminate a busy wait in Pause dialog.

•	Corrects occasional failure of initial value smoothing pass (SMOOTHINIT).

•	Modify parser "Illegal Symbol" report to list all legal symbols.

•	Corrects "Bad Matrix Reference" error when using coupled value boundary conditions on inactive variables.

•	Corrects implementation of CONST ARRAYs reference in domain definitions.

•	Random number generator is initialized only on file opening, not on each parse.

•	Corrects indexing errors when using both CONTACT and INACTIVE controls.

Version 6.11

12/15/09

•	Corrects a memory leak associated primarily with vector plots.

•	Corrects an assertion error when lose dongle (or network) and retry.

•	Rotating a 3D mesh plot erroneously rotated all elevation plot locators.

•	Implements 1/complex and CLOG(complex).

•	Corrects errors in finding proper evaluation cells across thin domain gaps.

•	Corrects an error in computing the block-inverse preconditioner in systems with symmetric coupling matrices.

Version 6.10

11/10/09

•	Corrects an error in evaluation of integrals involving parameterized definitions.

•	Corrects an error in the export of time dependent Tecplot files.

•	Corrects the expansion of expressions containing the product of complex parameters and complex variables.

•	Add facility to bypass automatic update checks.

•	Additional plot error diagnostics.

•	Diagnoses and rejects TABLEs with duplicated coordinate points.

•	Improved error diagnostics in expression evaluation.

•	Corrects an error in the processing of cascaded definitions (i.e. A=B=<expression>).

•	Corrects an occasional error in ELEVATION plots on boundary curves in 3D.

•	Corrects an error in handling of ARRAYs and MATRIXs loaded by element definitions, e.g. A=ARRAY[n], A[1]=1.

Version 6.09

9/10/09

•	Restores consistency with version 5 in the sign of ELEVATION plots of NORMAL on interior boundaries.

•	Assures that boundary conditions on boundary paths will take precedence over boundary conditions on surfaces in 3D.

•	Diagnoses bad region references in building 3D domains.

•	Corrects errors in applying boundary conditions to INACTIVE variables.

•	Support for display of version 3 plot files.

•	Diagnoses mesh generation catastrophes due to near miss coordinates.

•	Corrects the implementation of "STAGED (a BY b TO c)"

•	Allow white space separators in STAGED lists (comma is now optional).

•	Corrects errors in the implementation of CONTACT boundaries in 1D problems.

•	Corrects an error (introduced in v6.04) that disabled the staging of ERRLIM.

Version 6.08

7/1/09

•	Added capability to communicate through a proxy server for update checks and internet key licensing. See the "Help \| Web Proxy Settings" menu.

•	Corrects and error in "Pause" control under Linux.

•	Corrects diagnosis of 0/0 in evaluator.

•	Corrects an indexing error in natural boundary conditions with sequenced equations.

•	Update status panel at fixed time intervals (reduces panel flashing on fast problems.)

•	Corrects application of boundary conditions to paths on specified surfaces in 3D.

Version 6.07

5/25/09

•	Corrects errors in memory usage report when scripts are re-run.

•	Reports license features of network dongles, even when connected as local dongle.

•	CONST ARRAY and CONST MATRIX store numbers rather than formulas. Allows generation of RANDOM arrays and matrices.

•	Corrects an error in EXPORT of ELEVATION (array) with no VS qualifier.

•	Implements "SELECT RANDOM_SEED=integer" to control random number generator.

•	Sorts CRITICAL time list.

•	Improved diagnostic for arithmetic errors in TIME_INTEGRALs.

•	Defers printer connection to point of need, to avoid slow startup in systems with faulty printer specifications.

•	Implements "SELECT DEBUG(GRID)" to aid in diagnosing mesh generation difficulties.

•	Corrects an error that bypassed mesh density induction in closely spaced extrusion surfaces.

•	Corrects an error in gridding 3D boundaries with sharp hidden breaks in surface slope.

Version 6.06

4/16/09

•	Added capability for XCOMP, YCOMP and ZCOMP to work with POINTs.

•	EXPORT of MATRIX plot now uses matrix dimensions for table size.

•	Corrects use of global MESH_SPACING and MESH_DENSITY controls.

•	Corrects various errors in COMPLEX expression evaluation.

•	Corrects errors in "View File" progress bar and hot keys.

•	Corrects error in BATCH rerun.

•	Corrects error in "Save As" of non-pde files.

•	Corrects occasional crash on program close.

Version 6.05

3/26/09

•	Test for "disk full" errors while writing a PG6 output file.

•	Added capability to stop the reading of a PG6 "view" file.

•	Correct font sizes on some Linux platforms.

•	Added capability for a CRITICAL time list.

•	Added MODE_SUMMARY plot selector for compatibility with version 5 in eigenvalue problems.

•	Corrects occasional errors in identifying duplicate plot domain specifications.

•	Corrects occasional errors in locating positions in curved cells in 3D.

•	Corrects occasional "Can't match prior cells" error.

•	Corrects implementation of NATURAL boundary conditions in 1D Cylindrical and 1D Spherical models (area weighting factor had been omitted).

Version 6.04

2/20/09

•	Corrects an error in treatment of default error limit when ERRLIM is referenced but not defined.

•	Corrects an occasional error in treatment of explicitly defined vectors in 2D problems.

•	Corrects treatment of "New File" creation - new file is now displayed correctly.

•	SUMMARY report for eigenvalue problems now sorts global and modal values.

•	VIEW of graphic files now allows selection of plot time from a drop-down list.

•	Corrects occasional crash in reporting errors on Linux platforms.

Version 6.03

2/5/09

•	Corrects an occasional error in SAVE operations with multiple threads.

•	Adds capability for plotting CONTOURs and SURFACEs on a deformed mesh.

•	Adds labels for the second plot function in dual-contour plots.

•	Abandons attempts to apply timestep controls to steady-state equations in time-dependent problems. (Use SELECT SS_TIMECHECK to restore behavior of earlier versions.)

Version 6.02

1/23/09

•	Corrects an error in the -T command line switch for selecting default thread count.

•	Modifies the logic of controlling matrix re-computation in nonlinear time-dependent problems, replaces the NRMATRIX switch with REMATRIX and restores version 5 switches PREFER_SPEED and PREFER_STABILITY.

•	Corrects a threading error in SAVE and EVAL functions that caused data corruption with multiple threads.

•	Corrects student-mode operation of the demonstration version.

•	Corrects a memory protection fault when a plot mesh was empty.

•	Corrects the import of version 5 transfer files.

•	Corrects an error in the Jacobian matrix for variable dependence on integrals on imbedded features.

•	Corrects occasional errors reading configuration and license files.

•	Corrects an error that reset log file timestamps to zero after 24 hours of run time.

Version 6.01

1/9/09

•	Corrects an error in automatic update checking.

•	Corrects an intermittent error in rewriting license file.

•	Corrects an intermittent error in startup of time dependent problems with initial timestep much too large.

Version 6.00

1/2/09

FlexPDE Version 6 is a major rewrite of the FlexPDE application.

Among the new features of FlexPDE version 6 in the initial release are:

•	Multithreading- Support for dual and quad core processors. Run multiple problems simultaneously or use up to 8 threads for parallel execution within a single problem.

•	Complex, Vector and Array Variables and Equations - Direct support of these data types simplifies equation construction.

•	Regionally Inactive Variables - Variables can be declared inactive in some regions and active in others.

•	Multiple Equation Sets - Splitting of equations into sets that are solved sequentially and alternately.

•	Internal Tabulation Facility - Build on-the-fly tables of computationally intensive parameters for more economical execution.

•	Arrays and Matrices - Extended support allows array and matrix operations for use in equations, graphics and domain construction.

•	Planes, Cylinders, Spheres - Simplified Construction of Planes, Cylinders and Spheres in 3D.

•	Stop and Restart Facility - Simplified facility for restarting a script after stopping.

•	Additional Status Graphs - Updated graphical interface to include plots of cell/node number, error, convergence and timestep.

•	Web-based Licensing - Move license from machine to machine with web actions.

Page url: index.html?version6.html