Compatibility Issues in Maple 6The following is a brief description of the compatibility issues that affect users upgrading from Maple V Release 5 to Maple 6.To upgrade Release 5 source code files to Maple 6, use the updtsrc utility. This utility automatically upgrades Release 5 source code files to Maple 6.Renamed RoutinesObsolete Packages and FunctionsNumerics-related ChangesMatrices, ., and ||New Keywords and NamesMiscellaneousObsolete Syntax

<Text-field style="Heading 2" layout="Heading 2" bookmark="bkmrk0">Renamed Routines</Text-field>The C, fortran, cost, eqn and optimize functions have been renamed the codegen[C], codegen[fortran], codegen[cost], codegen[eqn], and codegen[optimize] functions.The split, splits, and translate functions have been renamed the polytools[split], polytools[splits], and polytools[translate] functions.The chebyshev function has been renamed the numapprox[chebyshev] function.The numtheory[bernoulli], numtheory[euler], numtheory[ifactor], numtheory[ifactors], numtheory[isolve], numtheory[isprime], numtheory[ithprime], numtheory[nextprime], and numtheory[prevprime] functions have been renamed the bernoulli, euler, ifactor, ifactors, isolve, isprime, ithprime, nextprime, and prevprime functions.
<Text-field style="Heading 2" layout="Heading 2" bookmark="bkmrk1">Obsolete Packages and Functions</Text-field>The asubs function is now a compatibility function that calls the algsubs function. Do not use the old asubs function in new code.The command commutat and its associate functions c, convert(..., c), expand(..., c), and simplify(..., c) have been removed.The diffalg[formal_power_series] command has been superseded by the diffalg[power_series_solution] command.The evalgf command has been removed. Its functionality is superseded by the mod operator.The logic package has been removed.The totorder package has been removed. Its functionality is superseded by the assume facility.The unload command has been removed.The readlib command has been removed. For details, see the persistent store section of the updates,Maple6,language pageThe verify command has drastically changed syntax. For the new syntax, see the verify help page.
<Text-field style="Heading 2" layout="Heading 2" bookmark="bkmrk2">Numerics-related Changes</Text-field>Floating-point numbers as well as the values of Float(infinity), Float(undefined), complex infinity, and undefined are now parts of the numeric system in Maple. Also, floating-point zero is signed to determine branch cuts of functions. For more information, see infinity, undefined, type/infinity, and undefined.Complex numbers are now genuine numbers, not sums of real and imaginary parts as they were before. Therefore, complex numbers in Maple now exhibit the following behavior:select(has,2+3*I,I);type(I,radical);It is recommended to use the new idiom hastype(expr, nonreal) instead of the old has(expr, I).
<Text-field style="Heading 2" layout="Heading 2" bookmark="bkmrk3">Matrices, ., and ||</Text-field>The name-forming operator . has been replaced by the operator ||, which retains the same functionality. For more details, see concatenation.
<Text-field style="Heading 2" layout="Heading 2" bookmark="bkmrk4">New Keywords and Names</Text-field>The following are new protected keywords: catch, error, export(module,export), finally, module, return, try, and use.These are new protected words with special meaning: lastexception, march, and NumericEventLocation.The new protected built-in function names are: ArrayOptions, CopySign, exports, NumericClass, NumericEvent, NumericEventHandler, NumericStatus, OrderedNE, rtable, rtable_indfns, rtable_num_dims, rtable_num_elems, rtable_options, Scale10, selectremove, trace, and Unordered.The following are new protected library function names: apply, ArrayDims, ArrayElems, ArrayIndFns, ArrayNumDims, ArrayNumElems, ChebyshevT, ChebyshevU, CheckArgs, CylinderD, CylinderU, CylinderV, foldl, foldr, GegenbauerC, HermiteH, JacobiP, LaguerreL, Matrix, MatrixOptions, ProcessOptions, radfield, ratinterp, requires, rtable_dims, rtable_elems, selectfun, Vector, VectorOptions, and verify.
<Text-field style="Heading 2" layout="Heading 2" bookmark="bkmrk5">Miscellaneous</Text-field>The error message from series `division by zero` has been changed to "division by zero series".Angle brackets (< and >) are now used for forming the Vectors and Matrices used by the new LinearAlgebra package.Operations with univariate and bivariate polynomials modulo a prime number (modp1 and modp2 commands) now require that indeterminates be specified.Parametrized name conventions are now consistent throughout Maple. _Z stands for integers, _NN for non-negative integers, and _N for natural (positive) integers.allvalues now returns symbolic instead of numeric answers.simplify(<constant>(expression)) now returns <constant>.unapply no longer does automatic simplifications. This behavior is new:unapply(1/(1+f(x)),x);X11 resources on Unix systems start now with Maple6, not MapleV.
<Text-field style="Heading 2" layout="Heading 2" bookmark="bkmrk6">Obsolete Syntax</Text-field>The digraphs (* and *) for { and }, and (| and |) for [ and ] have been removed since modern keyboards now have the appropriate symbols.