bbotk

Black-Box Optimization Toolkit

v1.9.0 · Feb 27, 2026 · LGPL-3

Description

Features highly configurable search spaces via the 'paradox' package and optimizes every user-defined objective function. The package includes several optimization algorithms e.g. Random Search, Iterated Racing, Bayesian Optimization (in 'mlr3mbo') and Hyperband (in 'mlr3hyperband'). bbotk is the base package of 'mlr3tuning', 'mlr3fselect' and 'miesmuschel'.

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CRAN Check Status

7 WARNING

7 OK

Show all 14 flavors

Flavor	Status	Time
r-devel-linux-x86_64-debian-clang	WARNING	503.9s
r-devel-linux-x86_64-debian-gcc	WARNING	351.3s
r-devel-linux-x86_64-fedora-clang	WARNING	761.1s
r-devel-linux-x86_64-fedora-gcc	WARNING	836.8s
r-devel-macos-arm64	WARNING	113s
r-devel-windows-x86_64	WARNING	495s
r-oldrel-macos-arm64	OK	112s
r-oldrel-macos-x86_64	OK	794s
r-oldrel-windows-x86_64	OK	652s
r-patched-linux-x86_64	WARNING	475.9s
r-release-linux-x86_64	OK	449.5s
r-release-macos-arm64	OK	111s
r-release-macos-x86_64	OK	954s
r-release-windows-x86_64	OK	469s

Check details (7 non-OK)

WARNING r-devel-linux-x86_64-debian-clang

compiled code

File ‘bbotk/libs/bbotk.so’:
  Found non-API call to R: ‘Rf_findVar’
This entry point may be removed soon.

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

WARNING r-devel-linux-x86_64-debian-gcc

compiled code

File ‘bbotk/libs/bbotk.so’:
  Found non-API call to R: ‘Rf_findVar’
This entry point may be removed soon.

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

WARNING r-devel-linux-x86_64-fedora-clang

compiled code

File ‘bbotk/libs/bbotk.so’:
  Found non-API call to R: ‘Rf_findVar’
This entry point may be removed soon.

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

WARNING r-devel-linux-x86_64-fedora-gcc

compiled code

File ‘bbotk/libs/bbotk.so’:
  Found non-API call to R: ‘Rf_findVar’
This entry point may be removed soon.

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

WARNING r-devel-macos-arm64

compiled code

File ‘bbotk/libs/bbotk.so’:
  Found non-API call to R: ‘Rf_findVar’
This entry point may be removed soon.

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

WARNING r-devel-windows-x86_64

compiled code

File 'bbotk/libs/x64/bbotk.dll':
  Found non-API call to R: 'Rf_findVar'
This entry point may be removed soon.

Compiled code should not call non-API entry points in R.

See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.

WARNING r-patched-linux-x86_64

compiled code

File ‘bbotk/libs/bbotk.so’:
  Found non-API call to R: ‘Rf_findVar’
This entry point may be removed soon.

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

Additional Issues

OpenBLAS Details →

Check History

WARNING 9 OK · 4 NOTE · 1 WARNING · 0 ERROR · 0 FAILURE Mar 20, 2026

NOTE r-devel-linux-x86_64-debian-clang

compiled code

File ‘bbotk/libs/bbotk.so’:
  Found non-API call to R: ‘Rf_findVar’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

WARNING r-devel-linux-x86_64-debian-gcc

compiled code

File ‘bbotk/libs/bbotk.so’:
  Found non-API call to R: ‘Rf_findVar’
This entry point may be removed soon.

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

NOTE r-devel-linux-x86_64-fedora-clang

compiled code

File ‘bbotk/libs/bbotk.so’:
  Found non-API call to R: ‘Rf_findVar’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

NOTE r-devel-linux-x86_64-fedora-gcc

compiled code

File ‘bbotk/libs/bbotk.so’:
  Found non-API call to R: ‘Rf_findVar’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

NOTE r-devel-windows-x86_64

compiled code

File 'bbotk/libs/x64/bbotk.dll':
  Found non-API call to R: 'Rf_findVar'

Compiled code should not call non-API entry points in R.

See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.

NOTE 13 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 16, 2026

NOTE r-devel-linux-x86_64-debian-gcc

compiled code

File ‘bbotk/libs/bbotk.so’:
  Found non-API call to R: ‘Rf_findVar’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

OK 14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026

Reverse Dependencies (17)

imports

MicrobiomeStat counterfactuals miesmuschel mlr3fselect mlr3hyperband mlr3mbo mlr3tuning mlr3verse mlrintermbo sense

suggests

CryptRndTest DoubleML mlr3pipelines mlr3spatiotempcv mlr3tuningspaces mlr3viz xtdml

Dependency Network

Version History

new 1.9.0 Mar 10, 2026

updated 1.9.0 ← 1.8.1 diff Feb 27, 2026

updated 1.8.1 ← 1.8.0 diff Nov 25, 2025

updated 1.8.0 ← 1.7.1 diff Nov 5, 2025

updated 1.7.1 ← 1.7.0 diff Oct 23, 2025

updated 1.7.0 ← 1.6.0 diff Oct 9, 2025

updated 1.6.0 ← 1.5.0 diff Jun 2, 2025

updated 1.5.0 ← 1.4.1 diff Dec 16, 2024

updated 1.4.1 ← 1.4.0 diff Nov 26, 2024

updated 1.4.0 ← 1.3.0 diff Nov 25, 2024

updated 1.3.0 ← 1.2.0 diff Nov 6, 2024

updated 1.2.0 ← 1.1.1 diff Oct 24, 2024

updated 1.1.1 ← 1.1.0 diff Oct 14, 2024

updated 1.1.0 ← 1.0.1 diff Sep 8, 2024

updated 1.0.1 ← 1.0.0 diff Jul 23, 2024

updated 1.0.0 ← 0.8.0 diff Jun 27, 2024

updated 0.8.0 ← 0.7.3 diff Feb 28, 2024

updated 0.7.3 ← 0.7.2 diff Nov 12, 2023

updated 0.7.2 ← 0.7.1 diff Dec 7, 2022

updated 0.7.1 ← 0.7.0 diff Nov 29, 2022