diff --git a/src/apps/projinfo.cpp b/src/apps/projinfo.cpp
index 4892d4f170..45a78c8209 100644
--- a/src/apps/projinfo.cpp
+++ b/src/apps/projinfo.cpp
@@ -394,8 +394,8 @@ static BaseObjectNNPtr buildObject(
             }
         }
     } catch (const std::exception &e) {
-        std::cerr << context << ": parsing of user string failed: " << e.what()
-                  << std::endl;
+        std::cerr << context << ": parsing of '" << l_user_string
+                  << "' failed: " << e.what() << std::endl;
         std::exit(1);
     }
 
diff --git a/src/iso19111/c_api.cpp b/src/iso19111/c_api.cpp
index f21216a5c0..9d378bf7d5 100644
--- a/src/iso19111/c_api.cpp
+++ b/src/iso19111/c_api.cpp
@@ -603,6 +603,14 @@ PJ *proj_create(PJ_CONTEXT *ctx, const char *text) {
             proj_context_errno_set(ctx, PROJ_ERR_INVALID_OP_WRONG_SYNTAX);
         }
         proj_log_error(ctx, __FUNCTION__, e.what());
+    } catch (const NoSuchAuthorityCodeException &e) {
+        proj_log_error(ctx, __FUNCTION__,
+                       std::string(e.what())
+                           .append(": ")
+                           .append(e.getAuthority())
+                           .append(":")
+                           .append(e.getAuthorityCode())
+                           .c_str());
     } catch (const std::exception &e) {
         proj_log_error(ctx, __FUNCTION__, e.what());
     }
@@ -791,6 +799,14 @@ PJ *proj_create_from_database(PJ_CONTEXT *ctx, const char *auth_name,
             break;
         }
         return pj_obj_create(ctx, NN_NO_CHECK(obj));
+    } catch (const NoSuchAuthorityCodeException &e) {
+        proj_log_error(ctx, __FUNCTION__,
+                       std::string(e.what())
+                           .append(": ")
+                           .append(e.getAuthority())
+                           .append(":")
+                           .append(e.getAuthorityCode())
+                           .c_str());
     } catch (const std::exception &e) {
         proj_log_error(ctx, __FUNCTION__, e.what());
     }
diff --git a/test/unit/test_c_api.cpp b/test/unit/test_c_api.cpp
index b508392d93..a69f9ea6d8 100644
--- a/test/unit/test_c_api.cpp
+++ b/test/unit/test_c_api.cpp
@@ -232,6 +232,20 @@ TEST_F(CApi, proj_create) {
         ObjectKeeper keeper(obj);
         EXPECT_NE(obj, nullptr);
     }
+
+    {
+        PJ_CONTEXT *ctxt = proj_context_create();
+        std::string s;
+        proj_log_func(ctxt, &s, [](void *user_data, int, const char *msg) {
+            *static_cast<std::string *>(user_data) = msg;
+        });
+        auto crs = proj_create(ctxt, "EPSG:i_do_not_exist");
+        proj_destroy(crs);
+        proj_context_destroy(ctxt);
+        EXPECT_EQ(crs, nullptr);
+        EXPECT_STREQ(s.c_str(),
+                     "proj_create: crs not found: EPSG:i_do_not_exist");
+    }
 }
 
 // ---------------------------------------------------------------------------
@@ -1094,6 +1108,22 @@ TEST_F(CApi, proj_create_from_database) {
                         "step proj=axisswap order=2,1"));
         EXPECT_EQ(info.accuracy, 1);
     }
+
+    {
+        PJ_CONTEXT *ctxt = proj_context_create();
+        std::string s;
+        proj_log_func(ctxt, &s, [](void *user_data, int, const char *msg) {
+            *static_cast<std::string *>(user_data) = msg;
+        });
+        auto crs = proj_create_from_database(ctxt, "EPSG", "i_do_not_exist",
+                                             PJ_CATEGORY_CRS, false, nullptr);
+        proj_destroy(crs);
+        proj_context_destroy(ctxt);
+        EXPECT_EQ(crs, nullptr);
+        EXPECT_STREQ(
+            s.c_str(),
+            "proj_create_from_database: crs not found: EPSG:i_do_not_exist");
+    }
 }
 
 // ---------------------------------------------------------------------------