Hello,

I am using RStudio and have gotten the following error when running API code to get data from RedCap into a web-based interface. I am new to R and a previous person set this up to run and pull data from RedCap so that others can quickly sort through and filter based on web page. Any help would be appreciated. Thank you

When I run the app code I get the following:

plumber::plumb(file='app_main.R')$run()

data.table 1.14.8 using 24 threads (see ?getDTthreads). Latest news: r-datatable.com

Attaching package: ‘dplyr’

The following objects are masked from ‘package:data.table’:

```
between, first, last
```

The following objects are masked from ‘package:stats’:

```
filter, lag
```

The following objects are masked from ‘package:base’:

```
intersect, setdiff, setequal, union
```

Attaching package: ‘lubridate’

The following objects are masked from ‘package:data.table’:

```
hour, isoweek, mday, minute, month, quarter, second, wday, week, yday, year
```

The following objects are masked from ‘package:base’:

```
date, intersect, setdiff, union
```

Loading required package: bit

Attaching package: ‘bit’

The following object is masked from ‘package:dplyr’:

```
symdiff
```

The following object is masked from ‘package:data.table’:

```
setattr
```

The following object is masked from ‘package:base’:

```
xor
```

Attaching package bit64

package:bit64 (c) 2011-2017 Jens Oehlschlaegel

creators: integer64 runif64 seq :

coercion: as.integer64 as.vector as.logical as.integer as.double as.character as.bitstring

logical operator: ! & | xor != == < <= >= >

arithmetic operator: + - * / %/% %% ^

math: sign abs sqrt log log2 log10

math: floor ceiling trunc round

querying: is.integer64 is.vector [is.atomic} [length] format print str

values: is.na is.nan is.finite is.infinite

aggregation: any all min max range sum prod

cumulation: diff cummin cummax cumsum cumprod

access: length<- [ [<- [[ [[<-

combine: c rep cbind rbind as.data.frame

WARNING don't use as subscripts

WARNING semantics differ from integer

for more help type ?bit64

Attaching package: ‘bit64’

The following objects are masked from ‘package:base’:

```
%in%, :, is.double, match, order, rank
```

Running plumber API at http://127.0.0.1:6257

Running swagger Docs at http://127.0.0.1:6257/__docs__/

<simpleError in .subset2(x, i, exact = exact): attempt to select less than one element in get1index>

<simpleError in .subset2(x, i, exact = exact): attempt to select less than one element in get1index>

<simpleError in .subset2(x, i, exact = exact): attempt to select less than one element in get1index>

<simpleError in .subset2(x, i, exact = exact): attempt to select less than one element in get1index>

<simpleError in .subset2(x, i, exact = exact): attempt to select less than one element in get1index>