A minimal exemple of my trouble.
fricas
(1) -> <spad>
fricas
)abbrev domain MINI MinimalInitialNotIntegrated
MinimalInitialNotIntegrated(x,F): Exports == Implementation where
    x: Symbol
    F: Field
    INT ==> Integer
    P ==> UnivariatePolynomial(x,F)
    FRP ==> Fraction P
    LFRP ==> List FRP
    Exports == with
       degreeX: % -> INT
    Implementation == add
       Rep := LFRP
       degreeX f ==
          a := [denom i for i in f::Rep]@List(P)  --  denom : FRAC UP -> UP(x,F)
          b := map(di +-> degree(di), a)$ListFunctions2(P, INT) -- degree : UP -> NonNegativeInteger
          --b := [degree i for i in a ]
          reduce( max, b ,0) :: INT</spad>
fricas
Compiling FriCAS source code from file 
      /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/1973871146429693580-25px001.spad
      using old system compiler.
   MINI abbreviates domain MinimalInitialNotIntegrated 
------------------------------------------------------------------------
   initializing NRLIB MINI for MinimalInitialNotIntegrated 
   compiling into NRLIB MINI 
   compiling exported degreeX : % -> Integer
Time: 0.03 SEC.
(time taken in buildFunctor:  0)
;;;     ***       |MinimalInitialNotIntegrated| REDEFINED
;;;     ***       |MinimalInitialNotIntegrated| REDEFINED
Time: 0 SEC.
   Cumulative Statistics for Constructor MinimalInitialNotIntegrated
      Time: 0.03 seconds
   finalizing NRLIB MINI 
   Processing MinimalInitialNotIntegrated for Browser database:
--->-->MinimalInitialNotIntegrated(constructor): Not documented!!!!
--->-->MinimalInitialNotIntegrated((degreeX ((Integer) %))): Not documented!!!!
--->-->MinimalInitialNotIntegrated(): Missing Description
; compiling file "/var/aw/var/LatexWiki/MINI.NRLIB/MINI.lsp" (written 06 FEB 2025 07:25:26 PM):
; wrote /var/aw/var/LatexWiki/MINI.NRLIB/MINI.fasl
; compilation finished in 0:00:00.004
------------------------------------------------------------------------
   MinimalInitialNotIntegrated is now explicitly exposed in frame 
      initial 
   MinimalInitialNotIntegrated will be automatically loaded when needed
      from /var/aw/var/LatexWiki/MINI.NRLIB/MINIWe need to package call map, otherwise compilation would fail.
The compiler is unable to find out the mode for 
+->, since it doesn't know what map he is supposed to use. It is tedious, but the cure is to package call 
map. Furthermore, it is usually easier to debug packages.
In fact, even with fully types +->, the compilation fails, because the compiler can not find
appropriate map.
spad
)abbrev domain MINI MinimalInitialNotIntegrated
MinimalInitialNotIntegrated(x,F): Exports == Implementation where
    x: Symbol
    F: Field
    INT ==> Integer
    P ==> UnivariatePolynomial(x,F)
    FRP ==> Fraction P
    LFRP ==> List FRP
    Exports == with
       degreeX: LFRP -> INT
    Implementation == add
       Rep := LFRP
       degreeX f ==
          a := [denom i for i in f::Rep] --  denom : FRAC UP -> UP(x,F)
        --b := map( degree , a ) -- degree : UP -> NonNegativeInteger
          b := [degree i for i in a ]
          reduce( max, b ,0) :: INT
spad
   Compiling FriCAS source code from file 
      /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/914813484557723871-25px002.spad
      using old system compiler.
   MINI abbreviates domain MinimalInitialNotIntegrated 
------------------------------------------------------------------------
   initializing NRLIB MINI for MinimalInitialNotIntegrated 
   compiling into NRLIB MINI 
   compiling exported degreeX : List Fraction UnivariatePolynomial(x,F) -> Integer
Time: 0.01 SEC.
(time taken in buildFunctor:  0)
;;;     ***       |MinimalInitialNotIntegrated| REDEFINED
;;;     ***       |MinimalInitialNotIntegrated| REDEFINED
Time: 0 SEC.
   Cumulative Statistics for Constructor MinimalInitialNotIntegrated
      Time: 0.02 seconds
   finalizing NRLIB MINI 
   Processing MinimalInitialNotIntegrated for Browser database:
--->/var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/1973871146429693580-25px001.spad-->MinimalInitialNotIntegrated(constructor): Not documented!!!!
--->/var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/1973871146429693580-25px001.spad-->MinimalInitialNotIntegrated((degreeX ((Integer) (List (Fraction (UnivariatePolynomial x F)))))): Not documented!!!!
--->/var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/1973871146429693580-25px001.spad-->MinimalInitialNotIntegrated(): Missing Description
; compiling file "/var/aw/var/LatexWiki/MINI.NRLIB/MINI.lsp" (written 06 FEB 2025 07:25:26 PM):
; wrote /var/aw/var/LatexWiki/MINI.NRLIB/MINI.fasl
; compilation finished in 0:00:00.004
------------------------------------------------------------------------
   MinimalInitialNotIntegrated is already explicitly exposed in frame 
      initial 
   MinimalInitialNotIntegrated will be automatically loaded when needed
      from /var/aw/var/LatexWiki/MINI.NRLIB/MINIfricas
list:List FRAC UP(x,FRAC INT):= [x^2+1/x::FRAC UP(x,FRAC INT), x+1/x^2]
fricas
degreeX(list)$MINI(x, FRAC INT)
Type: Integer