LaTeX errors when creating PDF version.
This typically indicates Rd problems.
LaTeX errors found:
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.
! Package textcomp Error: Symbol \textasciigrave not provided by
(textcomp)                font family zi4 in TS1 encoding.
(textcomp)                Default family used instead.

See the textcomp package documentation for explanation.