diff --git a/R/monolix2rx.R b/R/monolix2rx.R
index 65cd74f..acdb67c 100644
--- a/R/monolix2rx.R
+++ b/R/monolix2rx.R
@@ -89,10 +89,12 @@ monolix2rx <- function(mlxtran, update=TRUE, thetaMatType=c("sa", "lin"),
   .admd <- NULL
   .cmt <- NULL
   if (!is.null(.mlxtran$MODEL$LONGITUDINAL$LONGITUDINAL$file)) {
-    if (!file.exists(.mlxtran$MODEL$LONGITUDINAL$LONGITUDINAL$file)) {
-      stop("the model file '", .mlxtran$MODEL$LONGITUDINAL$LONGITUDINAL$file, "' does not exist\nyou may need to setup the model library to complete translation",
-           call.=FALSE)
-    }
+    withr::with_dir(.monolixGetPwd(.mlxtran), {
+      if (!file.exists(.mlxtran$MODEL$LONGITUDINAL$LONGITUDINAL$file)) {
+        stop("the model file '", .mlxtran$MODEL$LONGITUDINAL$LONGITUDINAL$file, "' does not exist\nyou may need to setup the model library to complete translation",
+             call.=FALSE)
+      }
+    })
   }
   if (is.null(.mlxtran$MODEL$LONGITUDINAL$EQUATION) &&
         !is.null(.mlxtran$MODEL$LONGITUDINAL$PK)) {