Appendix A: Error Conditions 207

Error 3: Improper Register Number or Matrix Element

Storage register named is nonexistent or matrix element indicated is nonexistent.

Error 4: Improper Line Number or Label Call

Line number called for is currently unoccupied or nonexistent (>448); or you have attempted to load a program line without available space; or the label called does not exist; or User mode is on and you did not press ´ before ¤, ', @, yor .

Error 5: Subroutine Level Too Deep

Subroutine nested more than seven deep.

Error 6: Improper Flag Number

Attempted a flag number >9.

Error 7: Recursive _ or f

A subroutine which is called by _ also contains a _ instruction; a subroutine which is called by falso contains an finstruction.

Error 8: No Root

_unable to find a root using given estimates.

Error 9: Service

Self-test discovered circuitry problem, or wrong key pressed during key test.

Error 10: Insufficient Memory

There is not enough memory available to perform a given operation.

Error 11: Improper Matrix Argument

Inconsistent or improper matrix arguments for a given matrix operation:

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HP 15c Scientific manual Error 3 Improper Register Number or Matrix Element, Error 4 Improper Line Number or Label Call