Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘rmd_templates.Rd’ ‘writing_sources.Rd’
Running examples in ‘rock-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: qna_to_tlm
> ### Title: Convert a QNA network to Linear Topic Map format
> ### Aliases: qna_to_tlm
> 
> ### ** Examples
> 
> ### Get path to example source
> examplePath <-
+   system.file("extdata", package="rock");
> 
> ### Read a souce coded with the Qualitative Network Approach
> qnaExample <-
+   rock::parse_source(
+     file.path(
+       examplePath,
+       "network-example-1.rock"
+     )
+   );
> 
> ### Convert and show the topic map
> cat(
+   rock::qna_to_tlm(
+     qnaExample
+   ),
+   sep="\n"
+ );
Error in unlist(df$from, df$to) : 'recursive' must be a length-1 vector
Calls: cat -> <Anonymous> -> lapply -> FUN -> unique -> unlist
Execution halted
Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘rmd_templates.Rd’ ‘writing_sources.Rd’
Running examples in ‘rock-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: qna_to_tlm
> ### Title: Convert a QNA network to Linear Topic Map format
> ### Aliases: qna_to_tlm
> 
> ### ** Examples
> 
> ### Get path to example source
> examplePath <-
+   system.file("extdata", package="rock");
> 
> ### Read a souce coded with the Qualitative Network Approach
> qnaExample <-
+   rock::parse_source(
+     file.path(
+       examplePath,
+       "network-example-1.rock"
+     )
+   );
> 
> ### Convert and show the topic map
> cat(
+   rock::qna_to_tlm(
+     qnaExample
+   ),
+   sep="\n"
+ );
Error in unlist(df$from, df$to) : 'recursive' must be a length-1 vector
Calls: cat -> <Anonymous> -> lapply -> FUN -> unique -> unlist
Execution halted
Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘rmd_templates.Rd’ ‘writing_sources.Rd’
Running examples in ‘rock-Ex.R’ failed
The error most likely occurred in:

> ### Name: qna_to_tlm
> ### Title: Convert a QNA network to Linear Topic Map format
> ### Aliases: qna_to_tlm
> 
> ### ** Examples
> 
> ### Get path to example source
> examplePath <-
+   system.file("extdata", package="rock");
> 
> ### Read a souce coded with the Qualitative Network Approach
> qnaExample <-
+   rock::parse_source(
+     file.path(
+       examplePath,
+       "network-example-1.rock"
+     )
+   );
> 
> ### Convert and show the topic map
> cat(
+   rock::qna_to_tlm(
+     qnaExample
+   ),
+   sep="\n"
+ );
Error in unlist(df$from, df$to) : 'recursive' must be a length-1 vector
Calls: cat -> <Anonymous> -> lapply -> FUN -> unique -> unlist
Execution halted
Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘rmd_templates.Rd’ ‘writing_sources.Rd’
Running examples in ‘rock-Ex.R’ failed
The error most likely occurred in:

> ### Name: qna_to_tlm
> ### Title: Convert a QNA network to Linear Topic Map format
> ### Aliases: qna_to_tlm
> 
> ### ** Examples
> 
> ### Get path to example source
> examplePath <-
+   system.file("extdata", package="rock");
> 
> ### Read a souce coded with the Qualitative Network Approach
> qnaExample <-
+   rock::parse_source(
+     file.path(
+       examplePath,
+       "network-example-1.rock"
+     )
+   );
> 
> ### Convert and show the topic map
> cat(
+   rock::qna_to_tlm(
+     qnaExample
+   ),
+   sep="\n"
+ );
Error in unlist(df$from, df$to) : 'recursive' must be a length-1 vector
Calls: cat -> <Anonymous> -> lapply -> FUN -> unique -> unlist
Execution halted
Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    'rmd_templates.Rd' 'writing_sources.Rd'
Running examples in 'rock-Ex.R' failed
The error most likely occurred in:

> ### Name: qna_to_tlm
> ### Title: Convert a QNA network to Linear Topic Map format
> ### Aliases: qna_to_tlm
> 
> ### ** Examples
> 
> ### Get path to example source
> examplePath <-
+   system.file("extdata", package="rock");
> 
> ### Read a souce coded with the Qualitative Network Approach
> qnaExample <-
+   rock::parse_source(
+     file.path(
+       examplePath,
+       "network-example-1.rock"
+     )
+   );
> 
> ### Convert and show the topic map
> cat(
+   rock::qna_to_tlm(
+     qnaExample
+   ),
+   sep="\n"
+ );
Error in unlist(df$from, df$to) : 'recursive' must be a length-1 vector
Calls: cat -> <Anonymous> -> lapply -> FUN -> unique -> unlist
Execution halted