diff --git a/src/lib.rs b/src/lib.rs
index 846351d..4c529dc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -12,12 +12,11 @@
 use core::panic;
 
 use address::{PhysicalAddress, VirtualAddress, VirtualAddressRange};
-use alloc::format;
-use alloc::string::String;
 use block::{Block, BlockIterator};
 
 use bitflags::bitflags;
 use packed_struct::prelude::*;
+use thiserror::Error;
 
 use self::descriptor::DescriptorType;
 
@@ -37,16 +36,20 @@
 mod region_pool;
 
 /// Translation table error type
-#[derive(Debug)]
+#[derive(Debug, Error)]
 pub enum XlatError {
-    InvalidParameterError(String),
-    AllocationError(String),
-    AlignmentError(String),
-    Overflow,
-    InvalidOperation(String),
-    Overlap,
-    NotFound,
-    RegionPoolError(RegionPoolError),
+    #[error("Invalid parameter: {0}")]
+    InvalidParameterError(&'static str),
+    #[error("Cannot allocate {1}: {0:?}")]
+    PageAllocationError(RegionPoolError, usize),
+    #[error("Alignment error: {0:?} {1:?} length={2:#x} granule={3:#x}")]
+    AlignmentError(PhysicalAddress, VirtualAddress, usize, usize),
+    #[error("Entry not found for {0:?}")]
+    VaNotFound(VirtualAddress),
+    #[error("Cannot allocate virtual address {0:?}")]
+    VaAllocationError(RegionPoolError),
+    #[error("Cannot release virtual address {1:?}: {0:?}")]
+    VaReleaseError(RegionPoolError, VirtualAddress),
 }
 
 /// Memory attributes
@@ -207,13 +210,7 @@
         let mut pages = self
             .page_pool
             .allocate_pages(data.len(), Some(self.granule as usize))
-            .map_err(|e| {
-                XlatError::AllocationError(format!(
-                    "Cannot allocate pages for {} bytes ({:?})",
-                    data.len(),
-                    e
-                ))
-            })?;
+            .map_err(|e| XlatError::PageAllocationError(e, data.len()))?;
 
         pages.copy_data_to_page(data);
 
@@ -225,7 +222,7 @@
         } else {
             self.regions.allocate(pages_length, physical_region, None)
         }
-        .map_err(XlatError::RegionPoolError)?;
+        .map_err(XlatError::VaAllocationError)?;
 
         self.map_region(region, access_rights.into())
     }
@@ -246,11 +243,7 @@
         let mut pages = self
             .page_pool
             .allocate_pages(length, Some(self.granule as usize))
-            .map_err(|e| {
-                XlatError::AllocationError(format!(
-                    "Cannot allocate pages for {length} bytes ({e:?})"
-                ))
-            })?;
+            .map_err(|e| XlatError::PageAllocationError(e, length))?;
 
         pages.zero_init();
 
@@ -262,7 +255,7 @@
         } else {
             self.regions.allocate(pages_length, physical_region, None)
         }
-        .map_err(XlatError::RegionPoolError)?;
+        .map_err(XlatError::VaAllocationError)?;
 
         self.map_region(region, access_rights.into())
     }
@@ -288,7 +281,7 @@
         } else {
             self.regions.allocate(length, resource, None)
         }
-        .map_err(XlatError::RegionPoolError)?;
+        .map_err(XlatError::VaAllocationError)?;
 
         self.map_region(region, access_rights.into())
     }
@@ -310,7 +303,7 @@
 
         self.regions
             .release(region_to_release)
-            .map_err(XlatError::RegionPoolError)
+            .map_err(|e| XlatError::VaReleaseError(e, va))
     }
 
     /// Query physical address by virtual address range. Only returns a value if the memory area
@@ -327,10 +320,10 @@
     ) -> Result<PhysicalAddress, XlatError> {
         let containing_region = self
             .find_containing_region(va, length)
-            .ok_or(XlatError::NotFound)?;
+            .ok_or(XlatError::VaNotFound(va))?;
 
         if !containing_region.used() {
-            return Err(XlatError::NotFound);
+            return Err(XlatError::VaNotFound(va));
         }
 
         Ok(containing_region.get_pa_for_va(va))
@@ -349,10 +342,10 @@
     ) -> Result<(), XlatError> {
         let containing_region = self
             .find_containing_region(va, length)
-            .ok_or(XlatError::NotFound)?;
+            .ok_or(XlatError::VaNotFound(va))?;
 
         if !containing_region.used() {
-            return Err(XlatError::NotFound);
+            return Err(XlatError::VaNotFound(va));
         }
 
         let region = VirtualRegion::new_with_pa(containing_region.get_pa_for_va(va), va, length);
@@ -555,7 +548,7 @@
             self.granule,
         )?;
         for block in blocks {
-            self.map_block(block, attributes.clone());
+            self.map_block(block, attributes.clone())?;
         }
 
         Ok(region.base())
@@ -592,7 +585,7 @@
     /// # Arguments
     /// * block: Memory block that can be represented by a single translation table entry
     /// * attributes: Memory block's permissions, flags
-    fn map_block(&mut self, block: Block, attributes: Attributes) {
+    fn map_block(&mut self, block: Block, attributes: Attributes) -> Result<(), XlatError> {
         Self::set_block_descriptor_recursively(
             attributes,
             block.pa,
@@ -603,7 +596,7 @@
             &self.page_pool,
             &self.regime,
             self.granule,
-        );
+        )
     }
 
     /// Adds the block descriptor to the translation table along all the intermediate tables the
@@ -629,7 +622,7 @@
         page_pool: &PagePool,
         regime: &TranslationRegime,
         granule: TranslationGranule<VA_BITS>,
-    ) {
+    ) -> Result<(), XlatError> {
         // Get descriptor of the current level
         let descriptor = &mut table[va.get_level_index(granule, level)];
 
@@ -639,33 +632,49 @@
             descriptor.set_block_or_invalid_descriptor_to_invalid(level);
             Self::invalidate(regime, Some(va));
             descriptor.set_block_descriptor(granule, level, pa, attributes);
-            return;
+            return Ok(());
         }
 
         // Need to iterate forward
         match descriptor.get_descriptor_type(level) {
             DescriptorType::Invalid => {
+                // Allocate page for next level table
                 let mut page = page_pool
                     .allocate_pages(
                         granule.table_size::<Descriptor>(level + 1),
                         Some(granule.table_alignment::<Descriptor>(level + 1)),
                     )
-                    .unwrap();
-                unsafe {
-                    let next_table = page.get_as_mut_slice();
-                    descriptor.set_table_descriptor(level, next_table, None);
-                }
-                Self::set_block_descriptor_recursively(
+                    .map_err(|e| {
+                        XlatError::PageAllocationError(
+                            e,
+                            granule.table_size::<Descriptor>(level + 1),
+                        )
+                    })?;
+
+                let next_table = unsafe { page.get_as_mut_slice() };
+
+                // Fill next level table
+                let result = Self::set_block_descriptor_recursively(
                     attributes,
                     pa,
                     va.mask_for_level(granule, level),
                     block_size,
                     level + 1,
-                    unsafe { descriptor.get_next_level_table_mut(granule, level) },
+                    next_table,
                     page_pool,
                     regime,
                     granule,
-                )
+                );
+
+                if result.is_ok() {
+                    // Set table descriptor if the table is configured properly
+                    unsafe { descriptor.set_table_descriptor(level, next_table, None) };
+                } else {
+                    // Release next level table on error and keep invalid descriptor on current level
+                    page_pool.release_pages(page).unwrap();
+                }
+
+                result
             }
             DescriptorType::Block => {
                 // Saving current descriptor details
@@ -675,22 +684,22 @@
 
                 // Replace block descriptor by table descriptor
 
-                // Follow break-before-make sequence
-                descriptor.set_block_or_invalid_descriptor_to_invalid(level);
-                Self::invalidate(regime, Some(current_va));
-
+                // Allocate page for next level table
                 let mut page = page_pool
                     .allocate_pages(
                         granule.table_size::<Descriptor>(level + 1),
                         Some(granule.table_alignment::<Descriptor>(level + 1)),
                     )
-                    .unwrap();
-                unsafe {
-                    let next_table = page.get_as_mut_slice();
-                    descriptor.set_table_descriptor(level, next_table, None);
-                }
+                    .map_err(|e| {
+                        XlatError::PageAllocationError(
+                            e,
+                            granule.table_size::<Descriptor>(level + 1),
+                        )
+                    })?;
 
-                // Explode block descriptor to table entries
+                let next_table = unsafe { page.get_as_mut_slice() };
+
+                // Explode existing block descriptor into table entries
                 for exploded_va in VirtualAddressRange::new(
                     current_va,
                     current_va
@@ -700,23 +709,48 @@
                 .step_by(granule.block_size_at_level(level + 1))
                 {
                     let offset = exploded_va.diff(current_va).unwrap();
+
+                    // This call sets a single block descriptor and it should not fail
                     Self::set_block_descriptor_recursively(
                         current_attributes.clone(),
                         current_pa.add_offset(offset).unwrap(),
                         exploded_va.mask_for_level(granule, level),
                         granule.block_size_at_level(level + 1),
                         level + 1,
-                        unsafe { descriptor.get_next_level_table_mut(granule, level) },
+                        next_table,
                         page_pool,
                         regime,
                         granule,
                     )
+                    .unwrap();
                 }
 
                 // Invoke self to continue recursion on the newly created level
-                Self::set_block_descriptor_recursively(
-                    attributes, pa, va, block_size, level, table, page_pool, regime, granule,
+                let result = Self::set_block_descriptor_recursively(
+                    attributes,
+                    pa,
+                    va.mask_for_level(granule, level + 1),
+                    block_size,
+                    level + 1,
+                    next_table,
+                    page_pool,
+                    regime,
+                    granule,
                 );
+
+                if result.is_ok() {
+                    // Follow break-before-make sequence
+                    descriptor.set_block_or_invalid_descriptor_to_invalid(level);
+                    Self::invalidate(regime, Some(current_va));
+
+                    // Set table descriptor if the table is configured properly
+                    unsafe { descriptor.set_table_descriptor(level, next_table, None) };
+                } else {
+                    // Release next level table on error and keep invalid descriptor on current level
+                    page_pool.release_pages(page).unwrap();
+                }
+
+                result
             }
             DescriptorType::Table => Self::set_block_descriptor_recursively(
                 attributes,
@@ -744,7 +778,7 @@
             &self.page_pool,
             &self.regime,
             self.granule,
-        );
+        )
     }
 
     /// Removes block descriptor from the translation table along all the intermediate tables which